Acids, 382; Reaction of Ellagic and Flavellagic Acids,
624

Perkin (Dr. W. H.), Memorial to, 419, 444

Perkin Jubilee and Chemical Industries, the, Sir Henry E.
Roscoe, F.R.S., 438

Perkin (W. H., jun.), Synthesis of Optically Active Modifi-
cations of 4-p-Menthenol(8) and ▲3:(9)-p-Menthadiene,
479
Perkin (W. H., sen.), Improved Apparatus for measuring
Magnetic Rotations and obtaining a Powerful Sodium
Light, 623

Pernet (Dr. George), Dr. Finsen's Light-treatment of
Disease, 323

Perry (Prof. John, F.R.S.), Bursaries at the Royal Col-
lege of Science, 32; Practical Science for Schools, Pre-
sidential Address delivered before the Physical Society
by, 402

Persei, Nova, No. 2, the Spectrum of, 18; Observations of,
Dr. K. Graff, 305

Perseus, Cluster of Nebulæ in, Dr. Max Wolf, 448
Petersen (Dr. C. G. J.), Development of Plaice in the
Baltic Sea, 35

Pethybridge (Dr. G. H.), Causes of "Blowing" in Tins
of Condensed Milk, 358

Pethyridge (G. H.), Survey of the Vegetation of the Dis-
trict South of Dublin, 303

Petrography and Geology of the Igneous Rocks of the
Highwood Mountains, Montana, L. V. Pirsson, 376
Petrol Car, the, Motor-Car Mechanism and Management,
W. Poynter Adams, 580

Petterson (Otto), Correlation of Hydrographic, Biological,
and Meteorological Data, 210

Pflanzen, Biochemie der, Prof. Dr. Fr. Czapek, F.
Escombe, 193; Corr., 341

Pharmacology: Death of Prof. W. Mayer, 346
Philippine Islands, Scientific Research in the, (1) Descrip-
tion of New Buildings, Paul C. Freer, (2), a Catalogue
of the Library, Mary Polk, Prof. R. T. Hewlett, 57;
an Ethnological Survey of the, Dr. A. C. Haddon,
F.R.S., 584

Philips' Large Planisphere, H. Gewecke, 269

Philips' Model Atlas, 484

Phillips (Charles E. S.), Production of an Electrically Con-
ductive Glass, 512

Phillips (M. C.), the Use of Wood Pulp for Paper-making,
397

Phillips (P.), Magnetic Susceptibility of Iron in Colloidal
Solution, 455

Phillips (Prof. R. W.), on Recent Advances in Our Know-
ledge of Seaweeds, 162-3

Phillipson (Prof. Dr. A.), Geology of the West of Asia
Minor, 546

Philology: a Grammar of the Kafir Language, J. McLaren,
Sir H. H. Johnston, K.C.M.G., 481
Philosophy Things and Sensations, Prof. Stout, I'
Goethe's Philosophie aus seinen Werken, 98; Immanuel
Kant, Physische Geographie, 98; Dialogue über natür-
liche Religion, über Selbstmord und Unsterblichkeit der
Seele, David Hume, 98; Immanuel Kant's Kleinere
Schriften zur Logik und Metaphysik, 98; G. W. F.
Hegel, Encyclopädie der Philosophischen Wissenschaften
im Grundrisse, 98; Cambridge Philosophical Society,
118, 191, 455, 527, 599; Philosophic Foundations of
Science, Prof. Arthur Schuster, 313; Essays on Evolu-
tion and Design, Prof. John Young, 56; Erkenntnis und
Irrtum, Prof. Ernst Mach, Supp. to November 30, vii
Phoebe, the Ninth Satellite of Saturn, Prof. W.
Pickering, 63

H.

Phoebe, Observations of, during 1905, 474
Phosphorescence of Pyro-Soda Developer, T. A.
Vaughton, 389

Phosphorescent Marine Animals, Prof. McIntosh, 349
Photography: Border occasionally seen between Light and
Dark Regions on Photographic Prints, Sir Oliver Lodge,
F.R.S., 5, 54; Dr. F. J. Allen, 29; R. Child Bayley,
29; Photographic Star Catalogue, 18; Halation, J. A.
Cobb, 54: Nature through Microscope and Camera,
Richard Kerr, 104; Wild Wings: Adventures of a
Camera-Hunter among the Larger Wild Birds of North
America on Sea and Land, H. K. Job, 123; Instruction
in Photography, Sir W. de W. Abney, 124; Pictures

from Nature, Richard and Cherry Kearton, 148; Action
of Wood on a Photographic Plate, Dr. William J.
Russell, F.R.S., 152; the Practical Photographer, 172;
Photographs of Jupiter's Sixth and Seventh Satellites,
182; Photography for the Press, 196; the British Journal
Photographic Almanac and Photographer's Daily Com-
panion for 1906, 221; Photographs of Solar Granula-
tions, Prof. Hansky, 255; Deutscher Kamera Almanach,
1906, Fritz Loescher, 318; Photography in Natural
Colours, 330; a New Method of Determining the Moon's
Position Photographically, Mr. Wade, 352; Die Photo-
graphie im Hochgebirg, Emil Terschak, 388; Phosphor-
escence of Pyro-Soda Developer, T. A. Vaughton, 389;
Photographies de la Granulation Solaire faites à Poul-
kowa, Prof. A. Hansky, W. E. Rolston, 401; Photo-
graphic Study of the Duration of Discharge in
Crookes Tube, André Broca and M. Turchini, 431;
the Practical Photographer, No. 27, Photographic Optics
and Lenses, No. 28, the Optical Lantern for Projection
and Enlarging, 437; First Photographs of the Canals
of Mars, Prof. Percival Lowell, 453; Request for Prints
of Photographic Portraits, Dr. Francis Galton, F.R.S.,
534; Photography of the Solar Protuberances
Coloured Screens during the Eclipse of August 30, 1905,
H. Deslandres and G. Blum, 576; Death and Obituary
Notice of Hermann Schnaus, 589; Observations and
Photographs of Black and Grey Soap Films, Herbert
Stansfield, 597; a Large Photographic Nebula in Scorpio,
Prof. Barnard, 618

a

with

Photomicrography with Ultra-Violet Light, Photographs of
Diatoms taken by the Zeiss Apparatus, Designed by
Dr. August Köhler, Mr. Rheinberg, 287

Phylogeny: Die Spaltöffnungsapparat im Lichte der
Phylogenie, Ein Beitrag zur "phylogenetischen Pflanzen-
histologie, Dr. Otto Porsch, 436

Physical Condition of Children in Elementary Schools, Dr.
Kerr, 548

Physics Replicas of Diffraction Gratings, R. J. Wallace,
21; Thomas Thorp, 79; the Writer of the Note, 79;
Ergebnisse und Probleme der Elektronentheorie, Prof.
H. A. Lorentz, Dr. H. A. Wilson, 27; Problems in
Practical Physics, F. R. Pearson, 28; the Use of Gasoline
in Chemical and Physical Laboratories, J. R. Foster, 29;
Physical Society, 47, 95, 142, 357, 502, 526, 575; Prac-
tical Science for Schools, Presidential Address at
Physical Society, Prof. J. Perry, F.R.S., 402; Mole-
cular Forces and Newtonian Laws, Alex. Clark, 51:
Explication méchanique de la Matière, de l'Électricité
et du Magnetisme, M. Despaux, 51; Death of Dr.
Johann Meidinger, 58; Influence of Phase Changes on
Tenacity of Ductile Metals, G. T. Beilby and H. N.
Beilby, 70; Impossibility of Negative Impulse Waves in
Gases, Gyözö Zemplén, 71; Influence of the Earth's
Rotation on Ocean Currents, W. Walfrid Ekman, 86;
New Determination of the Mass of a Cubic Decimetre
of Pure Water, H. Buisson, 86; Convection Effects in
a Heated Liquid, C. H. Burgess, 143; the Movements
of Diatoms caused by the Evolution of Gas, Daniel D.
Jackson, 159; the Stability of Motion of Viscous Liquids,
F. R. Sharpe, 159; the Accurate Measurement of Ionic
Velocities, Dr. R. B. Denison and Dr. B. D. Steele,
166; Radio-activity of Ordinary Matter in Connection
with the Earth's Internal Heat, Hon. R. J. Strutt,
F.R.S., 173; the Physical and Chemical Properties of
Iron Carbonyl, Sir James Dewar and H. O. Jones, 188;
an Acoustical Method for the Demonstration of the
Magnetism of Liquids, T. Terada, 197; Dewar's Method
of Producing High Vacua by Means of Charcoal, Lord
Blythswood and H. S. Allen, 207; Physical and Chemical
Properties of Solutions of Chloroform and other Anæs-
thetics, Prof. B. Moore and Dr. Herbert E. Roaf, 213;
Physics of Ore Flotation, J. Swinburne and Dr. G.
Rudolf, 214; the Analytical Theory of Light, J. Walker,
241; Kristallinische Flussigkeiten und flussige Kristalle,
Rudorf Schenck, 242; Heat a Mode of Motion, Charles
E. Benham, 246; Fluorescence, G. Camichel, 277:
Elongation of Wires by Flexion, MM. Bouasse and
Berthier, 277: Higher Mathematics for Students of
Chemistry and Physics, with Special Reference to Prac-
tical Work, Dr. J. W. Mellor, 290; Science and Hypo-
thesis, Prof. H. Poincaré, Prof. Arthur Schuster, F.R.S.,

June 14, 1906_

313; Wissenschaft und Hypothese, Prof. H. Poincaré,
Prof. Arthur Schuster, F.R.S., 313; Fresnel's Theory
of Double Refraction, James Walker, 319; the Thermal
Dilatation of Compressed Hydrogen, Prof. A. W. Wit-
kowski, 325; Atti della Reale Accademia della Scienze
Fisiche e Matematiche di Napoli, 327; Density of Ice,
A. Leduc, 335; La Théorie moderne des Phénomènes
physiques, Radio-activité, Ions, Electrons, Prof. Augusto
Righi, 340; Isothermal Distillation of Nitrogen and
Oxygen, and of Argon and Oxygen, I. K. Inglis, 357;
Propagation of Longitudinal Waves of Magnetic Flux
along Iron Wires and Rods, Prof. Lyle and Mr. Baldwin,
358; Form of Initiational Disturbance more Convenient
than that of §§ 3-31 of Previous Papers on Waves,
Lord Kelvin, 358; Illustrations of the Indefinite Exten-
sion and Multiplication of a Group of Two-Dimensional
Deep-Sea Waves, Initially Finite, Lord Kelvin, 359;
Initiation and Continued Growth of a Train of Two-
Dimensional Waves due to the Sudden Commencement
of a Stationary Periodically Varying Forcive, Lord
Kelvin, 359; Lehrbuch der Physik, O. D. Chwolson,
362; Traité de Physique, O. D. Chwolson, 362; Lehr-
buch der technischen Physik, Prof. Hans Lorenz, 364;
Secondary Röntgen Rays and Atomic Weight, Dr.
Charles G. Barkla, 365; Death and Obituary Notice of
Prof. A. S. Popow, 371; Determination of the Osmotic
Pressures of Solutions by the Measurement of their
Vapour Pressures, Earl of Berkeley and E. G. J. Hartley,
380; Relation between Normal "Take-up" and Degree
of Twist in Twisted Threads, T. Oliver, 383; Experi-
mental Results in Connection with Hydrodynamical
Theory of Seiches, P. White and W. Watson, 383;
Atomic Disintegration, Prof. W. Meigen, 389; Emis-
sion of Light by Kanal-strahlen Normal to their Direc-
tion, Dr. J. Stark, 389; Inversion Point of the Joule-
Kelvin Effect, Prof. Alfred W. Porter, 390; the Rela-
tion of Mechanics to Physics, Prof. Alexander Ziwet,
403; the Partition of Energy, Prof. W. F. Magie, 404;
Apparatus for Separation of Oxygen and Nitrogen by
Liquefaction of Air, Georges Claude, 423; Ionisation in
Gases from Coloured Flames, Percival Lewis, 424; Con-
tributions from the Jefferson Physical Laboratory of
Harvard University, 427; Method of Producing Waves
of Frequency Intermediate between Heat Waves and
Hertzian Waves, Prof. Reginald A. Fessenden, 428;
Death and Obituary Notice of Prof. Samuel Pierpont
Langley, 443; Expansion of a Gas into a Vacuum and
the Determination of the Specific Heat at Constant Pres-
sure for Gases, G. F. C. Searle, 455; Behaviour of
Liquid Films Formed from a Solution of Saponin in
Water, H. Stansfield, 455: a Plea for Absolute Motion,
Prof. Arthur Schuster, F.R.S., 462; Norman R. Camp-
bell, 484; F. J. W. Whipple, 535; the Existence of Abso-
lute Motion, Daniel Comstock, 582; the Diffusion of
Solids, John H. Howell, 464; Some Applications of the
Theory of Electric Discharge through Gases to Spectro-
scopy, Prof. J. J. Thomson, F.R.S., at Royal Institution,
405; Production of an Electrically Conductive Glass,
Charles E. S. Phillips, 512; the National Physical
Laboratory, 514; Les Quantités élementaire d'Electricité :
Ions, Electrons, Corpuscles, Dr. O. W. Richardson, 529;
Spectral Series in Relation to Ions, Dr. J. Stark, 533;
Gaseous Osmosis through a Colloidal Membrane, Jules
Amar, 551; the Dynamics of Particles and of Rigid,
Elastic, and Fluid Bodies, Prof. Arthur Gordon Webster,
555; Physical and Chemical Characters of Huff, 572:
Elevation of the Boiling Point of Aqueous Solutions of
Electrolytes, Rev. S. M. Johnston, 75: the Organised
Science Series: (1) First Stage Physiography, 578;
Science Handbooks for Laboratory and Class Room :
Elementary Physics, John N. Brown, 578; Examples in
Physics, C. E. Jackson, 578; Advanced Examples in
Physics, A. O. Allen, 578; Physics, Charles R. Mann
and George R. Twiss, 578; Diurnal Periodicity of Ionisa-
tion of Gases, Alex. Wood, 583; Oscillation of Flame
Cones, Harold E. Temple, 512; Prof. A. Smithells.
F.R.S., 512; Prof. W. Galloway, 584; Observations and
Photographs of Black and Grey Soap Films, Herbert
Stansfield, 597; Vapour Pressure of a Pure Liquid at
Constant Temperature, Prof. Sydney Young,
Zwölf Vorlesungen über die Natur des Lichtes, Dr. J.

599;

Classen, 606; Diurnal Variation of Ionisation in Closed
Vessels, Dr. O. W. Richardson, 607; Death and Obituary
Notice of Prof. Pierre Curie, 612; Landolt-Börnstein-
Physikalisch-chemische Tabellen, Drs. Börnstein and
Meyerhoffer, Dr. J. A. Harker, Supp. to November 30, vi
Physiography the Organised Science Series, (1) First
Stage Physiography, 578

Physiology: Terminology in Electro-physiology, Dr. David
Fraser Harris, 5; Prof. J. S. MacDonald, 28; Dr. A. D.
Waller, F.R.S., 78; Dr. George J. Burch, F.R.S., 78;
Influence of High Altitudes on the General Nutrition,
H. Guillemard and R. Moog, 120; Death and Obituary
Notice of Prof. Iwan Michaelowitsch Ssetschenoff, 133;
Text-book of Hygiene based on Physiology for the Use
of School Teachers, A. Watt Smyth, 170; Crystallised
Hæmatin, MM. Piettre and Vila, 192; Studies in General
Physiology, Jacques Loeb, 195; the Biometrics of Brain-
Weights, 200; the Temperature of the Monkey, Drs.
Sutherland Simpson and J. J. Galbraith, 216; Effects
of Varying Diets upon Growth and Nutrition, Dr.
Chalmers Watson, 239; Physiologie de la Lecture et de
l'Ecriture, Émile Javal, J. Herbert Parsons, 268; Hand-
book of Physiology for Students and Practitioners of
Medicine, Dr. Austin Flint, Prof. J. S. Macdonald, 269;
a Respiration Calorimeter with Appliances for the Direct
Determination of Oxygen, Profs. W. O. Atwater and
F. G. Benedict, 276; Chlorides in Nerve Cells and
Fibres, Prof. A. B. Macallum and Miss M. L. Menten,
311; Physiological Economy in Nutrition, 328; Action of
Sulphate of Hordenine on the Circulation, L. Camus,
336; Respiration of Salamanders, Miss Seelye, 348;
Influence of Thymus Feeding on Allantoin Excretion, Dr.
J. Maclachlan, 358; Physiological Conditions of Oral
Teaching, Pierre Bonnier, 359; Anti-Coagulating Power
of the Blood Serum of the Lower Animals, J. Sellier,
408; Histology and Physiology of the Placenta in the
Ungulata, Dr. J. W. Jenkinson, 430; Articulation of the
Vertebrate Jaw, H. G. F. Spurrell, 430; Chemical Con-
stitution of Protoplasm as Shown by the Rate of Tissue
Disintegration, Dr. H. M. Vernon, 454; Recuperative
Effects of Raw Meat after Fasting, Charles Richet, 456;
Protective Mechanism against Excess of Alkali, Drs.
Edie and Whitley, 474; Physiological Properties of West
Indian Boxwood, Harvey Gibson, 474; Outlines of
Physiological Chemistry, Dr. S. P. Beebe and Prof.
B. H. Buxton, Prof. Benjamin Moore, 483; Sound and
Rhythm, W. Edmunds, Prof. John G. McKendrick,
F.R.S., 483; Effects of the Absorption of Tuberculin by
the Digestive Tube, A. Calmette and M. Breton, 503;
the Reaction of the Blood a Function of Nutrition, Jean
Gautrelet, 504; Höhenklima und Bergwanderungen in
ihrerwirkung auf den Menschen, N. Zuntz, A. Loewy,
F. Müller, and W. Caspari, 553; Influence of Increased
Barometric Pressure on Man, Leonard Hill, F.R.S., and
M. Greenwood, 598; Physiologie des Menschen, Dr. L.
Luciani, Dr. J. A. Milroy, 606; the Intestinal Tract of
Mammals, Dr. Chalmers Mitchell, 618; Specificity and
Action in vitro of Gastrotoxin, Dr. Charles Bolton, 622;
Plant Physiology: Studien über die Regeneration, Prof.
B. Němec, 170; Present-Day Problems of Plant Physi-
ology, Prof. B. M. Duggar, 253; British Flowering
Plants, the Right Hon. Lord Avebury, 604; see also
British Association

Pickard (R. H.), Resolution of a-Phenyl-a' -4-hydroxy-
phenylethane by l-menthylcarbimide, 479

Pickering (Prof. E. C.), Nebulosity around Nova Aquilæ,
279; Measurements of Linné during the Total Eclipse of
the Moon, 569

Pickering (Prof. W. H.), Martian Meteorology, 38; Phoebe,
the Ninth Satellite of Saturn, 63; the Tenth Satellite of
Saturn, 87

Pickering (Prof.), Harvard College Observatory, 494; the
Observation of Long-Period Variables, 592; a Systematic
Study of Faint Stars, 545; Stars having Peculiar Spectra,
545
Pickering in Yorkshire, the Evolution of an English Town,
being the Story of the Ancient Town of, Gordon Home,
538
Picton (N.), Influence of Substituents in the Trinitroben-
zene Molecule on the Formation of Additive Compounds
with Arylamines, 551

Pictorial Annual, Penrose's, 269

Pictures from Nature, Richard and Cherry Kearton, 148
Piéron (H.), the Seat of the Recognition-Sense among
Ants, 134

Pierpont (J.), Lectures on the Theory of Functions of Real
Variables, 483

Piettre (M.), Crystallised Hæmatin, 192

Pirsson (L. V.), Petrography and Geology of the Igneous
Rocks of the Highwood Mountains, Montana, 376
Plague Epidemic, the Immunity of Europeans, 422
Plague in India, the Serum Therapy of, W. M. Haffkine,
Prof. R. T. Hewlett, 368

Planets Observations of Jupiter's Sixth Satellite, 18;
Photographs of Jupiter's Sixth and Seventh Satellites,
182; Systematic Error in Transit Observations of
Jovian Spots, Stanley Williams, 38; Observations of
Jupiter, Major Molesworth, 401; New Spot on Jupiter,
W. F. Denning, 584, 607; Variability of the Asteroid (444)
Gyptis, Dr. W. Valentiner, 39; Phoebe, the Ninth Satel-
lite of Saturn, Prof. W. H. Pickering, 63; Observations
of Phoebe during 1905, 474; the Tenth Satellite of Saturn,
Prof. W. H. Pickering, 87; Suggested Name for Nep-
tune's Satellite, M. Fouche, 182; Variability of Iris, Dr.
H. Clemens, 279

Planisphere, Philips's Large, H. Gewecke, 269

Plant Physiology: Studien über die Regeneration, Prof. B.
Němec, 170; Present-Day Problems of Plant Physiology,
Prof. B. M. Duggar, 253; British Flowering Plants, the
Right Hon. Lord Avebury, 604

Plants the Origin of Variations in Animals and Plants,
Prof. T. D. A. Cockerell, 197; New Creations in Plant
Life: an Authoritative Account of the Life and Work of
Luther Burbank, W. S. Harwood, 242; the Uses of
British Plants, Rev. Prof. G. Henslow, 270; Minnesota
Plant Disease, Dr. E. M. Freeman, 291; Organography
of Plants, Dr. K. Goebel, 412; the Utilisation of Nitrogen
in Air by Plants, T. Jamieson, 531, 607; A. D. H., 608;
Microscopic Aquatic Plants of our Waters, Dr. F. E.
Fritsch, at London Institution, 499

Platania (Prof.), Currents in the Straits of Messina, 621
Pleiades Stars, Catalogue of, Dr. R. S. Dugan, 617
Pocklington (Dr. H. C.), Cheirality of Form of Crystals of
Epsom Salt, 270

Pocock (R. I.), on an Alleged New Monkey from the
Cameroons, 297

Pohl (R.), Light Emitted by Radium Bromide due to the
Impact of the Becquerel Rays on the Particles of Nitro-
gen, 325

Poincaré (Prof. H.), Science and Hypothesis, 313; Wissen-
schaft und Hypothese, 313

Polar Exploration, 356

Polk (Mary), Scientific Research in the Philippine Islands,
a Catalogue of the Library, 57

Polonium and Radio-Tellurium, 549

Polytechnics, the Place of, in Education, Sir Norman
Lockyer, K.C.B., F.R.S., at Borough Polytechnic Insti-
tute, 521

Poor (Dr. C. L.), the Figure of the Sun, 279
Popow (Prof. A. S.), Death and Obituary Notice of, 371
Porlier (A.), Composition of a Cast-Iron Cannon Ball
found under Old Moat of the Bastille, 181

Porsch (Dr. Otto), Die Spaltöffnungsapparat im Lichte der
Phylogenie, Ein Beitrag zur phylogenetischen Pflanzen-
histologie, 436

Portraits, Request for Prints of Photographic, Dr. Francis
Galton, F.R.S., 534

Porter (J. T.), Selective Reflections, by Various Crystals,
in the Infra-Red Spectrum, 182

Porter (Prof. Alfred W.), Inversion Point of the Joule-
Kelvin Effect, 390

Positive Rays, the Spectrum of the (Canal-strahlen), Dr.
J. Stark, 79

Potter (Prof.), Topography of the Thorax and Abdomen,

Praeger (R. L.), Survey of the Vegetation of the District
South of Dublin, 303

Precious Stones considered in their Scientific and Artistic
Relations, Prof. A. H. Church, F.R.S., Supp. to Novem-
ber 30, x

Preservation of Antiquities, the, a Handbook for Curators,
Dr. Friedrich Rathgen, 412

Press, Photography for the, 196

Price (T. S.), Caro's Permonosulphuric Acid, 190
Prideaux (E. B. R.), the Fluorides of Selenium and Tel-
lurium, 71; Bromine Fluoride, 71; New Compounds of
Fluorine, 357

Priestley (J. H.), Mechanism of Carbon Assimilation in
Green Plants, 525

"Prima Philosophia," an Essay towards the, Carveth Read,

290

Pritzel (E.), Fragmenta Phytographia Australia occiden-
talis, 149

Prize Subjects of the Industrial Society of Mulhouse, 164
Prizes Awarded and Proposed by the Paris Academy of
Sciences, 233

Proceedings of the London Mathematical Society, 52
Protection of Birds, the, 521

Proteids, Studies on the Synthesis of Peptides and, Prof.
Emil Fischer, 519

Psychology: Esquisse d'une Théorie biologique du Som-
meil, Dr. Ed. Claparede, 293; Comparative Studies in the
Psychology of Ants and of Higher Animals, E. Wass-
mann, Lord Avebury, F.R.S., 315; an Analysis of
Human Motive, F. Carrel, 318; Die Mneme als erhal-
tendes im Wechsel des organischen Geschens, Richard
Semon, 338; the Senses of the Todas, Dr. W. H. R.
Rivers, 517; Influence of Bias and of Personal Equation
in Statistics of Ill-defined Qualities, G. Udny Yule, 551
Public Schools Science, Masters' Conference, Wilfred Mark
Webb, 308

Pulse of the Atmospheric Circulation, the, Dr. W. N.
Shaw, F.R.S., 175

Pumps and Pumping Engines, British Progress in, P. R.
Björling, 217

Purcell (Dr. W. F.), on Some Early Stages in the Develop-
ment of Peripatus, 40

Purvis (J. E.), Influence of Very Strong Electromagnetic
Fields on the Spark Spectra of Ruthenium, Rhodium, and
Palladium, 71; Influence of Very Strong Electromagnetic
Fields on the Spark Spectra of (a) Vanadium, (b) Plati-
num and Iridium, 527

Pyro-Soda Developer, Phosphorescence cf, T. A. Vaughton,
389

Quaintance (A. L.), the Cotton Bollworm, 257

Quantitative Analysis, Elements of, Dr. G. H. Bailey, 244
Quantitative Analysis, First Steps in, J. C. Gregory, 293
Quantitative Chemistry, Exercises in, Harmon Northrop
Morse, 268

Quénisset (M.), the Lunar Eclipse of February 8, 545
Questions for Archæologists, Some, Sir Norman Lockyer,
K.C.B., F.R.S., 280

Quiet Hours with Nature, Mrs. Brightwen, 4

Rabes (Dr. O.), Stylophthalmus paradoxus, 470
Radial Velocities of Certain Variable Stars, Prof. Frost, 39
Radio-activity of Ordinary Matter in Connection with the
Earth's Internal Heat, Hon. R. J. Strutt, F.R.S., 173
Radiography: Radium and other Radio-active_Substances,
their Application especially to Medicine, Dr. Charles
Baskerville, 2; Action of Radium on Gelatin Media, John
Butler Burke, 5; Action of Radium Salts on Gelatin,
W. A. Douglas Rudge, 78; Light Emitted by Radium
Bromide due to the Impact of the Becquerel Rays on the
Particles of Nitrogen, D. Himstedt and G. Meyer, 325;
Prof. B. Walter and R. Pohl, 325; Scintillations Pro-
duced by the Electronic "B-Rays emitted by Radium,
C. W. R., 341; Influence of the Rays of Radium on the
Resistance of Certain Solid and Liquid Dielectrics, Prof.
A. Righi, 375; Properties of the a Rays emitted by
Radium, Henri Becquerel, 407; Effect of High Tempera-
tures on Radium Emanation, W. Makower, 407; Action
of Radium Emanation on Chromogenic Bacteria, Ch.
Bouchard and M. Balthazard, 576; Certain Radio-active

Nature,
June 14, 1906_

Ex-

191;

Dr.

Properties of Uranium, T. Godlewski, 160;
periments on Canal-strahlen, Prof. Thomson,
Action of a Magnetic Field on the Goldstein Rays
(Canal-strahlen), Henri Pellat, 192; Energy of Secondary
Radiation, Prof. J. A. McClelland, 215; Kathodic Pul-
verisations, Ch. Maurain, 263; the Present Position of
Radio-activity, Frederick Soddy at Röntgen Society, 285;
Radio-activity, Prof. E. Rutherford, F.R.S., Hon. R. J.
Strutt, F.R.S., 289; La Théorie moderne des Phénomènes
physiques, Radio-activité, Ions, Electrons, Prof. Augusto
Righi, 340; Diminution of the Radio-activity of Polonium
with Time, Mme. Curie, 359; Secondary Röntgen Rays
and Atomic Weight, Dr. Charles G. Barkla, 365;
Polarisation in Secondary Röntgen Radiation,
C. G. Barkla, 501; Secondary Röntgen Radiation, Dr.
C. G. Barkla, 502; Secondary Radiation from Com-
pounds, Prof. J. A. McClelland and F. E. Hackett, 383;
"Radiobes, J. Butler Burke, 399; the Blondlot n-Rays,
A. A. Campbell Swinton, 413; Polonium and Radio-Tel-
lurium, 549; a New Product of Actinium, Dr. O. Hahn,
559; Transmission and Reflection of the Radiation from
Radio-active Substances, Prof. J. J. Thomson, 599; Death
and Obituary Notice of Prof. Pierre Curie, 612
Radium Radium and other Radio-active Substances: their
Application especially to Medicine, Dr. Charles Basker-
ville, 2; Action of Radium on Gelatin Media, John Butler
Burke, 5; Scintillations Produced by the Electronic "B-
Rays" emitted by Radium, C. W. R., 341; see Radio-
graphy

Radl (Dr. Em.), Geschichte der biologischen Theorie, seit
dem Ende des siebzehnten Jahrhunderts, 435
Railways, Electric, Theoretically and Practically Treated,
S. W. Ashe and J. D. Keiley, Maurice Solomon, 169
Rainbow, a Horizontal, W. R. M. Church, 608
Ramann (E.), Bodenkunde, 266

Rambaud (M.), Observation of the Brooks Comet (1906a),
407

Ramsbottom (J. E.), Action of Ultra-Violet Light on Moist
and Dried Mixtures of Carbon Monoxide and Oxygen, 190
Rankin (Margaret Cuthbert), the Art and Practice of
Laundry Work for Students and Teachers, 172
Ransome (F. L.), Report of Progress in the Geological Re-
Survey of the Cripple Creek District, Colorado, 376
Ransome (Mr.), the Nature of Carnotite, 547

Rastall (R. H.), Buttermere and Ennerdale Granophyre, 381
Rat Destruction and Disinfection on Shipboard, Methods of,
Drs. Haldane and Wade, 619

Rathgen (Friedrich), the Preservation of Antiquities, a
Handbook for Curators, 412

Rational Education, another Plea for, Prof. T. Clifford
Allbutt, F.R.S., 530

Rây (P. C.), Constitution of Silver Nitrites, 189

kaynor (Rev. G. H.), Breeding Experiments with Lepidop-
tera, 454

Read (A. A.), Methods for Determination of Manganese
in Iron and Steel, 36

Read (Carveth), the Metaphysics of Nature, 290
Recherches préhistoriques, Manuel de, 411
Reclamation Service, the United States, 591

Redikorzin (W.), the Visual Organs of the Ascidians of
the Salpa Group, 134

Reduction Tables for Equatorial Observations,
Frederick, 18

C. W.

Reed (William Allan), Negritos of Zamabales, 584
Refraction Constant, an Untried Method of Determining the,
Geo. A. Hill, 110

Refraction, Fresnel's Theory of Double, James Walker, 319
Refrigeration Modern Refrigerating Machinery, its Con-
struction, Methods of Working, and Industrial Applica-
tions, Prof. H. Lorenz, 122; American Practice in Re-
frigeration, H. M. Haven and F. W. Dean, 122
Regeneration, Studien über die, Prof. B. Nemec, 170
Rehn (Prof.), Stick Insect, O. viridipes, 397

Reichel (Principal H. R.), Some Characteristics of American
Universities, Address at University of Wales, Aberyst-
wyth, 44

Reid (Captain S. G.), Catalogue of the Collection of Birds'
Eggs in the British Museum (Natural History), 53
Reid (Dr. G. Archdall), Biological Foundations of Sociology,
94; the Principles of Heredity, with Some Applications,
121 the Principles of Heredity, 223

An Introduction to the Design of Beams, Girders, and
Columns in Machines and Structures, with Examples in
Graphic Statics, W. H. Atherton, I

Mechanics for Engineers, a Text-book of Intermediate
Standard, Arthur Morley, I

Radium and other Radio-active Substances; their Applica-
tion especially to Medicine, Dr. Charles Baskerville, 2
Garden Cities in Theory and Practice, A. R. Sennett, 2
Elementary Experimental Chemistry, A. E. Dunstan, 3
Wayside and Woodland Blossoms, Edward Step, 3
Quiet Hours with Nature, Mrs. Brightwen, 4
Sammlung Schubert XLII., Theorie der Electrizität und
des Magnetismus, Prof. Dr. J. Classen, 4
Vegetationsbilder, Drs. G. Karsten and H. Schenck, 4
Extinct Animals, E. Ray Lankester, F.R.S., 6

Report of Inter-State Astronomical and Meteorological Con-
ference, Adelaide, May, 1905, 8

Mechanics of Materials, Mansfield Merriman, 25
Handbuch der Blutenbiologie, Ernest Loew, 26
Chasse, Élevage et Piégeage, A. de Lesse, 26
Ergebnisse und Probleme der Elektronentheorie, Prof. H. A.
Lorentz, Dr. H. A. Wilson, 27

Die elektrischen Bogenlampen, deren Prinzip, Konstruk-
tion und Anwendung, J. Zeidler, H. Bohle, 27
Transactions of the South African Philosophical Society,
Catalogue of Printed Books, Papers, and Maps Relating
to the Geology and Mineralogy of South Africa to Decem.
ber 31, 1904, Miss M. Wilman, 28

Problems in Practical Physics, F. R. Pearson, 28
Die Vermessungs- und Absteckungs-Arbeiten für den
Simplon Tunnel, Prof. C. Koppe, 30

Researches on the Affinity of the Elements, and on the
Causes of Chemical Similarity or Dissimiliarity of Ele-
ments and Compounds, Geoffrey Martin, 49

Travels of a Naturalist in Northern Europe: Norway, 1871,
Archangel, 1872, Petchora, 1875, J. A. Harvie-Brown, 50
Practical Sea-Fishing, a Handbook for Sea Anglers, P. L.
Haslope, Frank Balfour Browne, 51

Molecular Forces and Newtonian Laws, Alex. Clark, 51
Explication méchanique de la Matière, de l'Électricité et
du Magnétisme, M. Despaux, 51

A Descriptive Handbook of Architecture, Martin A. Buck-
master, 52

Proceedings of the London Mathematical Society, 52
Catalogue of the Collection of Birds' Eggs in the British
Museum (Natural History), E. W. Oates and Captain
S. G. Reid, 53

Leather for Libraries, E. Wyndham Hulme, J. Gordon
Parker, A. Seymour-Jones, Cyril Davenport, and F. J.
Williamson, 53

Bureau of Government Laboratories, (1) Description of New
Buildings, Paul C. Freer, (2) a Catalogue of the Library,
Mary Polk, Prof. R. T. Hewlett, 57
Contributions from the Solar Observatory of the Carnegie
Institution of Washington, Prof. G. E. Hale, 67

A Student's Text-book of Zoology, Adam Sedgwick, F.R.S.,
73

The Study of Chemical Composition: an Account of its
Method and Historical Development, Ida Freund, 74
Index Kewensis Plantarum Phanerogamarum, W. T.
Thiselton-Dyer, 75

Sugar and the Sugar Cane, Noël Deerr, 75

My Strange Pets, and Other Memories of Country Life,
R. Bell, 76

Simple Lessons on Health for the Use of the Young, Sir
Michael Foster, K.C.B., 76

Actualités scientifiques, Max de Nansouty, 76

Great Batsmen, their Methods at a Glance, G. W. Beldam
and C. B. Fry, 82

Œuvres de Laguerre, 97

Goethe's Philosophie aus seinem Werken, 98
Immanuel Kant, Physische Geographie, 98

Dialoge über natürliche Religion, über Selbstmord und
Unsterblichkeit der Seele, David Hume, 98

Immanuel Kant's Kleinere Schriften zur Logik und Meta-
physik, 98

G. W. F. Hegel, Encyclopädie der philosophischen Wissen-
schaften im Grundrisse, 98

The Oxford Geographies, A. J. Herbertson, 99
Organic Evolution, C. W. Saleeby, 99

Le Chauffage des Habitations par Calorifères, M. Raymond
Périssé, 100

Auslese aus meiner Unterrichts- und Vorlesungspraxis,
Dr. Hermann Schubert, 100

Pangéométrie, ou Précis de Géométrie fondée sur

une

Théorie générale et rigoureuse des Parallèles, N. J.
Lobatschewsky, 100

Nature through Microscope and Camera, Richard Kerr, 104
An Account of the Deep Sea Holothuriadea Collected by
the Indian Marine Survey Ship Investigator, R. Koehler
and C. Vaney, 114

The Principles of Heredity, with some Applications, G. A.
Reid, 121

The Boston Colloquium, Edward Burr Van Vleck, Henry
Seely White and Frederick Shenstone Woods, 122
Lectures on the Calculus of Variations, Dr. Oskar Bolza,

122

H.

Modern Refrigerating Machinery, its Construction, Methods
of Working, and Industrial Applications, Prof.
Lorenz, 122

American Practice in Refrigeration, H. M. Haven and
F. W. Dean, 122

The Geography of New Zealand, P. Marshall, 123
Wild Wings, Adventures of a Camera-hunter among the
Larger Wild Birds of North America on Sea and Land,
H. K. Job, 123

Instruction in Photography, Sir W. de W. Abney, 124
La Bobine d'Induction, H. Armagnat, 124
Handbook of Metallurgy, Prof. Carl Schnabel, 124
The Origin and Influence of the Thoroughbred Horse, W.
Ridgeway, 126

A Preliminary Investigation of the More Important Features
of the Meteorology of Southern Asia, the Indian Ocean,
and Neighbouring Countries during the Period 1892-
1902, Sir John Eliot, F.R.S., 136

My Life, a Record of Events and Opinions, Alfred Russel
Wallace, 145

Magnetism and Electricity for Students, H. E. Hadley, 146
Gesammelte Abhandlungen von Robert Bunsen, Prof.
Arthur Smithells, F.R.S., 147

The Practical Study of Malaria and other Blood Parasites,
Dr. J. W. W. Stephens and S. R. Christophers, Prof.
R. T. Hewlett, 148

Pictures from Nature, Richard and Cherry Kearton, 148
Meteorologie und Klimatologie, Prof. Dr. Wilhelm Trabert,

Henderson, 149

Fragmenta Phytographiæ Australia Occidentalis, L. Diels
and E. Pritzel, 149

Sporting Sketches, E. Sandys, 149

Ships and Shipping, Commander R. Dowling, Commander
H. C. Lockyer, 150

The Little Black Princess, a True Tale of Life in the
Never-never Land, Jeanie Gunn, 155

The Theory of Experimental Electricity, W. C. D.
Whetham, Maurice Solomon, 169

Electric Railways, Theoretically and Practically Treated,
S. W. Ashe and J. D. Keiley, Maurice Solomon, 169
Modern Electric Practice, Maurice Solomon, 169

Text-book of Hygiene based on Physiology for the Use of
School Teachers, A. Watt Smyth, 170

Studien über die Regeneration, Prof. B. Němec, 170
Heredity, C. W. Saleeby, 171

The Practical Photographer, 172

Introduction to the Study of Organic Chemistry, John
Wade, 172

The Romance of Insect Life, Edmund Selous, 172
The Art and Practice of Laundry Work for Students and
Teachers, Margaret Cuthbert Rankin, 172

Beasties Courageous, Studies of Animal Life and Character,
D. English, 177

Northern Trails, some Studies of Animal Life in the Far
North, W. J. Long, 177

Water Supply and Irrigation Papers, 183

Ninth Annual Report of the Geological Commission of the
Cape of Good Hope, W. Gibson, 187

Biochemie der Pflanzen, Prof. Dr. Fr. Czapek, F. Escombe,
193

New Methods of Testing Explosives, C. E. Bichel, 194
The New Science of Causation, H. Croft Hiller, 194
Studies in General Physiology, Jacques Loeb, 195

Civil Engineering, a Text-book for a Short Course, Lieut.-
Colonel G. J. Fiebeger, 196

Thunder and Lightning, Camille Flammarion, 196
Photography for the Press, 196

How to Know the Starry Heavens, Edward Irving, 196
Everyday Life among the Head-hunters, and Other Experi-
ences from East to West, Dorothy Cator, 203
Summary of Progress of the Geological Survey of the
United Kingdom and Museum of Practical Geology for

1904, 204

National Engineering and Trade Lectures, British Progress
in Municipal Engineering, W. H. Maxwell, 217
British Progress in Pumps and Pumping Engines, P. R.
Björling, 217

British Progress in Gas Works' Plant and Machinery,
C. E. Brackenbury, 217

The Survey Atlas of England and Wales, J. G. Bartholo-
mew, 218

Report of the Committee on Leather for Bookbinding, 219
A Treatise on Ore and Stone Mining, Sir C. Le Neve
Foster, 220

The Useful Plants of the Island of Guam, W. E. Safford,

221

The British Journal Photographic Almanac and Photo-
grapher's Daily Companion for 1906, 221

Nature in Eastern Norfolk, Arthur H. Patterson, 221
The Central Tian-Shan Mountains, 1902-1903, Dr. Gott-
fried Merzbacher, 227

The Rocks of Cape Colville Peninsula, Auckland, New
Zealand, Prof. Sollas, F.R.S., 234

The Analytical Theory of Light, J. Walker, 241
Kristallinische Flussigkeiten und flussige Kristalle, Rudolf
Schenck, 242

New Creations in Plant Life, an Authoritative Account of
the Life and Work of Luther Burbank, W. S. Harwood,
242

Chemische Technologie, Dr. Fr. Heusler, 243

Future Forest Trees, A. H. Unwin, 244

Elements of Quantitative Analysis, Dr. G. H. Bailey, 244
Elementary Dynamics, W. M. Baker, 245

A Historical Geography of the British Colonies, C. P.
Lucas, C.B., 245

Vorlesungen über mathematische Näherungsmethoden, Dr.
Otto Biermann, 245

An Introduction to Geology, J. E. Marr, F.R.S., Prof.
Grenville A. J. Cole, 247

A Manual of Tides, Rollin A. Harris, 248
Survey of India, Captain H. A. Denholm Fraser, 250
Report on Fishery and Hydrographical Investigations in
the North Sea and Adjacent Waters, 1902-3, 255
The Cotton Bollworm, A. L. Quaintance and C. T. Brues,
Fred. V. Theobald, 257

The Mexican Cotton Boll Weevil, W. D. Hunter and
W. E. Hinds, Fred. V. Theobald, 257

The Colour Sensitivity of the Peripheral Retina, John
Wallace Baird, 260

The Interpretation of Nature, C. Lloyd Morgan, F.R.S.,
265

Bodenkunde, E. Ramann, 266

Soils and Fertilisers, Prof. H. Snyder, 266

The First Book of Geometry, Grace Chisholm Young and
W. H. Young, 267

Physiologie de la Lecture et de l'Écriture, Émile Javal
J. Herbert Parsons, 268