CONTENTS. Ul 



Page 

 5. Observations on Toads found alive at great depths in the ground. 

 By M. Geoffroy-Saint-Hilaire, - - - 358 



XXXIV. HISTORY OF MECHANICAL INVENTIONS AND PRO- 

 CESSES IN THE USEFUL ARTS, - - - 359 



1. Account of a Sea Couch for preventing Sea-sickness. By Mr S. 

 Pratt, New Bond Street, - - - - ib. 



2. Notice of Mr Perkins's Steam Engine, - - ib. 



3. Account of a new Register Kain-Gage. By B. Bevan, Esq. Civil 

 Engineer, - - - - . . ago 



4. New Process for making Steel. By Charles Mackintosh, Esq. 

 Glasgow, - - - - - 361 



5. Method of improving Soap. By Mr William Pope, Lombard 

 Street, - . - - . ib. 



XXXV. ANALYSIS OP SCIENTIFIC BOOKS AND MEMOIRS, 362 

 Memoir on the Geology of Central France, including the volcanic for- 

 mations of Auvergne, the Velay, and the Vivarais. By G. Pou- 

 LETT ScROPE, Esq. F. R. S., F. G. S. In one Volume 4to, with 



SL Volume of Plates, - . - - - ib. 



XXXVL PROCEEDINGS OF SOCIETIES, - . 370 



1. Royal Society of Edinburgh, - - . . jb. 



2. Proceedings of the Society for Promoting the Useful Arts in Scot- 

 land, ----- ib. 



3. Proceedings of the Royal Irish Academy, - - 371 



XXXVIL SCIENTIFIC INTELLIGENCE, - - 374 



I. NATURAL PHILOSOPHY. 



Astronomy. — 1. Figure of the Earth, deduced from observations on both 

 hemispheres. 2. Observatory at Vienna. 3. Comet of June 1827. 4. Co- 

 met of August 1827. 5. M. Bessel's Corrections on Bradley's Observa- 

 tions, ..... 374—375 



Optics. — 6. M. Cauchoix's New Achromatic Telescope, - 376 



Magnetism 7- Professor Hansteen's Magnetic Tour through Siberia. 8. 



M. Kuppfer on a peculiarity in the Magnetic Equator in Siberia, ib. 



HydrodynAxMICS. — 9. Heat evolved during the compression of Liquids, ib. 



Meteorology. — 10. Brilliant Aurorse Borealesin Scotland on the 27th and 

 28th August. 11. Hourly Meteorological Observations at Christiania and 

 Drontheim. 12. Meteorological Phenomena observed at Plymouth on Sun- 

 day, July 29, 1827, 376—377 



Acoustics 13. Sounds of Gas issuing under great Pressures. 14. M. Sa- 



vart on a New fact in Acoustics. 15. M. Savart on Normal Vibrations, 378 — 379 



Electricity 16. M. Becquerel on the Electricity from the pressure of two 



bodies, and the cleavage of Crystals, . - . 379 



II. chemistry. 

 17. Dr Christison on the Taste of Arsenic, and on its property of preserving 

 the Bodies of Persons who have been poisoned with it. 18. MM. Delarive 

 and Marcct on the specific heat of the Gases. 19. Phosphate of Magnesia 

 more soluble in cold than in hot water. 20. Liquid Phosphorus at 40° of 

 Fahrenheit. - - - - 379—381 



