REGIUS PROFESSOR OF NATURAL HISTORY, LECTURER ON MINERALOGY, AND KEEPER OF Fellow of the Royal Societies of London and Edinburgh; of the Antiquarian, Wernerian and Horti- APRIL...OCTOBER 1835. VOL. XIX. TO BE CONTINUED QUARTERLY. EDINBURGH: ADAM & CHARLES BLACK, EDINBURGH; LONGMAN, REES, ORME, BROWN, GREEN & LONGMAN, LONDON. 1835. 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. 3. On the Comet which will pass its Perihelion in November 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- ᏴᎬᎡᎢ, 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. 48 VII. Account of some of the Rarer Plants observed du- ring an Excursion in the United States and the Canadas in 1834. Communicated by Mr JAMES VIII. Remarks on the question, Does the observation made in Coal-mines of Canada and of Baffin's Bay, of plants analogous to those which live at present in equatorial regions, announce a change in the in- clination of the Ecliptic? By M. MARCEL DE IX. Account of the Founding of a New Grand Observa- tory for the Russian Empire, by the Imperial Academy of Sciences of St Petersburgh, X. Account of some remarkable Hailstones which fell XI. Account of an attempt to ascend Chimborazo, made on the 16th December 1831. By J. B. BOUSSIN- GAULT. In a letter addressed to Alexander Von XII. On the Characters of certain groups of the Class Personatæ. By DAVID DON, Esq. Libr. L. S., &c. 108 XIII. Account of the Discovery by Purkinje and Valentin of Ciliary Motions in Reptiles and Warm-blooded Animals; with Remarks, and additional Experi- ments. By WILLIAM SHARPEY, M. D., Discovery of Continual Vibratory Motions produced by Cilia, as a general Phenomenon in Reptiles, XIV. On the Manner in which Friction affects the Mo- tions of Time-Keepers. By EDWARD SANG, Esq. Teacher of Mathematics, Edinburgh, Member of XVI. Researches on Wines and other Fermented Liquors. By LEWIS C. BECK, M. D., Professor of Chemistry and Botany in the University of the City of New XVII. On the Action of Voltaic Electricity on Alcohol, XVIII. Memoir on the Degree of Selection exercised by Plants, with regard to the Earthy Constituents presented to their absorbing Surfaces. By CHARLES DAUBENY, M. D., F. R. S., L. S., G. S., 2. On the Imprint of the Feet of Animals upon Red Sandstone. 3. Rolling of the Sea on the Coast of Peru. 4. Large Mass of Native Copper. 5. 11. Effect of Mountain 8. On Aphis Persica. 9. Edible Birds Nests, how |