Dew, experiments upon Diamonds, fuppofed by Sir ISAAC NEWTON to be an unctuous fubftance have been melted away, and may be called chryftallized phlogifton Dionæa Mufcipula, account of it Difappointments, in philofophy, may promote science DOLLOND, Mr. his optical improvements E. Education, private and public, compared with respect to health knowledge Page 436 173 175 119 336 133 I 4 5 liberal, plan for its improvement in Manchester 16 ftage, between a grammar school and entrance upon Effluvia of burnt Greafe, or lamps, why offenfive 177 301 325 332 336 Electric Spark, whitens red flowers, &c. Enormity, of moral and political crimes very different PERCIVAL Experiments, why the refults are fometimes different what leffons we fhould learn from hence FAY, Mons. du, his experiments on dew 436 Fermentation, Fixed Air produces many effects not by its acid, but its Flame, its appearance when reflected by coloured glass 158 Flowers, deprived of their colouring particles, and reduced to perfect whiteness their colouring particles confiit chiefly of inflammable matter, which they receive from the rays of light Fog of 1783 FONTANA Abbe, breathed inflammable air FRANKLIN, Dr. his letter to Dr. PERCIVAL on the quantities of rain in different places jectures his meteorological imaginations and con Frequency of crimes, increases their political, but may 170 172 359 492 110 leffen their moral enormity Faftic, Mr. DELAVAL's experiments upon it G. Genevans, plan of an academy for them in Ireland combined with gold-its colour, &c. does not reflect from its anterior, but from its 357 302 161 34 95 227 231 GREGORY, Dr. account of his life by Dr. JOHNSTONE 80 H. HALES, Rev. Dr. difcovers a lithontriptic powder who lived eleven days without food Page 333 473 326 obfervations on the influence of fixed air HERMES, quoted, on experimental philofophy HIPPOCRATES, his account of those who die by famine 473 HOLWELL, Mr. at Calcutta HOWARD, Dr. his prefervatives against infection 484 505 HUNTER, Dr. opinion of fome large tufks in the tower 353 Hydrometer of Boyle, 371; of Clarke, 372; of Fahren heit, 373; of Fordyce and Quin 374 J. Indians, North Americans, their firm endurance of pain 458 Inftrument, new one, for measuring the fpecific gravity of bodies 370 JOHNSTONE, Dr. junior, of Worcester, his character and death 85 K. KAIMES, Lord, his account of a plane tree at New KNOX. Mr. on the morals of public fchools, quoted 122 II Laws Mammouth, defcription of, by MULLER Silver, to Mr. T. HENRY, junior MELVILL, Mr. on the colours of clouds on the polished needle. fwimming in water Mercury. phenomena of, explained by attraction 351 511 219 Metals, confift of tranfparent matter Meteorological Imaginations, &c. by Dr. FRANKLIN N. Narrative, of the fufferings of a collier NASH'S History of Worcestershire quoted, as to the man ner of making falt Needle, polished, how it swims on water Negro, gibbeted at Charlestown 467 423 435, 445 474 142 NEWTON, Sir ISAAC, difcovered the origin and nature of light and colours acknowledges the imperfection of his experiments relative to coloured fubftances Ochres, why they affume a blacker hue, when combined with oils 207 Oil Oil and Water, the phenomena of, accounted for by elective attraction by naturalifts, PLINY, &C. long ago remarked Opake Bodies, cause of their permanent colours Orichalcum, treatife on it by the Bishop of Landaff probably the fame with brass Pabula of Plants, what P. Page 422, 440 426 Paints, appear black, when the tranfmitted light is in tercepted, and when in thick masses Paris, a fubterraneous cavern there Paffions, their influence upon fenfation 47 48 65 414 163 361 456, 463 106 114 PERCIVAL, Dr. on the quantities of rain which fall at different heights on the perceptive power of vegetables on the pursuits of experimental philosophy 326 difference of his experiments on fixed air from thofe of Dr. PRIESTLEY narrative of a collier, buried in a coal-pit PARRY'S voyage to Upper Egypt, quoted Phlogifton, its folvent powers in whitening filk, linen, wax, &c. the real cause of many effects attributed to Plane Tree, account of one by lord KAIMES Punishment, the end of it, to prevent crimes the fubjects of it 467 512 138 410 177 178 121 49 296 |