THE EDINBURGH NEW PHILOSOPHICAL JOURNAL, EXHIBITING A VIEW OF THE PROGRESSIVE DISCOVERIES AND IMPROVEMENTS IN THE SCIENCES AND THE ARTS. CONDUCTED BY ROBERT JAMESON, REGIUS PROFESSOR OF NATURAL HISTORY, LECTURER ON MINERALOGY, AND KEEPER OF THE MUSEUM IN THE UNIVERSITY OF EDINBURGH; Fellow of the Royal Societies of London and Edinburgh; of the Antiquarian, Wernerian and Horticultural Societies of Edinburgh; Honorary Member of the Royal Irish Academy, and of the Royal Dublin Society; Fellow of the Royal, Linnean and Royal Geological Societies of London; Honorary Member of the Asiatic Society of Calcutta; of the Royal Geological Society of Cornwall, and of the Cambridge Philosophical Society; of the York, Bristol, Cambrian, Whitby, Northern, and Cork Institutions; of the Natural History Society of Northumberland, Durham, and Newcastle; of the Royal Society of Sciences of Denmark; of the Royal Academy of Sciences of Berlin ; of the Royal Academy of Naples; of the Imperial Natural History Society of Moscow; of the Imperial Pharmaceutical Society of Petersburgh; of the Natural History Society of Wetterau; of the Mineralogical Society of Jena; of the Royal Mineralogical Society of Dresden; of the Natural History Society of Paris; of the Philomathic Society of Paris; of the Natural History Society of Calvados; of the Senkenberg Society of Natural History; of the Society of Natural Sciences and Medicine of Heidelberg; Honorary Member of the Literary and Philosophical Society of New York; of the New York Historical Society; of the American Antiquarian Society; of the Academy of Natural Sciences of Philadelphia; of the Lyceum of Natural History of New York, of the Natural History Society of Montreal; of the Geological Society of France; of the South African Institution of the Cape of Good Hope; of the Franklin Institute of the State of Pennsylvania for the Promotion of the Mechanic Arts; of the Geological Society of Pennsylvania, &c. &c. APRIL...OCTOBER 1835. VOL. XIX. to be continued QUARTERLY. EDINBURGH: ADAM & CHARLES BLACK, EDINBURGH; LONGMAN, REES, ORME, BROWN, GREEN & LONGMAN, LONDON. THE NEW YORK PUBLIC LIBRARY ASTOR. LENOX AND TILDEN FOUNDATIONS PRINTED BY NEILL & COMPANY, OLD FISHMARKET. CONTENTS. II. On the Number of Comets in the Solar System; on their Light, whether Reflected or Emitted; and 2. On the Light of Comets; and on the means of deciding whether this light emanates from these bodies them- selves, or is borrowed from the Sun. III. On the periods of the Deluges of Deucalion, Oxyges, and Noah, according to the various calculations of time of different Nations. By Dr VON SCHU- IV. Note respecting the application of the Compressibi- lity of Water to Practical Purposes. By JAMES D. FORBES, Esq. F. R. SS. L. & E., Vice-Pres. Soc. |