CONTENTS. V 



Page 



Mr. Corbaux on the Laws of Mortality, and the Intensity of 



Human Life • • 19^ 



Mr. Ivory's Arguments tending to prove that the Earth is a Solid 



of Revolution 205 



Mr. U. Phillips on a new Compound of Oxygen and Manga- 

 nese ; with Remarks on Dr. Turner's Memoir on the Oxides 



of that Metal 209 



Dr. Thomson's Reply to Berzelius's Attack on his " Attempt 

 to establish the First Principles of Chemistry by Experi- 

 ment;" noticed in the Philosophical Magazine and Annals, 



vol. iv. p. 450 217 



Proceedings of the Royal Society 223 



. Linnsean Society 226 



Astronomical Society 227 



at the Friday Evening Meetings of the Royal 



Institution of Great Britain 230 



Society for the Encouragement of Arts, 



Manufactures, and Commerce 231 



Combination of Arsenic Acid with certain Kinds of Sugar — 

 Acetic Acid from Cinchona — Separation of Volatile Oils — 

 Action of Perchloride of Cyanogen on Water— Amylic Acid 232 

 Decomposition of Boracic Acid by Hydrogen — Rhutenium 



and Pluranium, new Metals 233 



Sulphuret of Silica — Magnesia and Glucina reduced to the 



Metallic State 234. 



Test for Oxygen in a Gaseous Mixture — Carbon in Pig Iron 235 

 Discovery of Coal near Leicester — Situation, Construction, &c. 

 of the Barometer registered by the Horticultural Society . . 236 



New South Shetland— Scientific Books 237 



Meteorological Observations 238 



. made by Mr. Booth at the Gar- 

 den of the Horticultural Society at Chiswick, near London, 

 by Mr. Giddy at Penzance, Dr. Burney at Gosport, and Mr. 

 Veal), at Boston 240 



NUMBER XXVIII.- APRIL. 

 Messrs. Von Oeynhausen and Von Dechen on the Junction of 



the Granite and the Killas Rocks in Cornwall {concluded). . 241 

 Mr. Ewart's Experiments and Observations on some of the 



Phaenomena attending the sudden Expansion of Compressed 



Elastic Fluids 247 



Dr. Turner's Remarks on Mr. Phillips's Essay on Manganese : 



— in a Letter to the Author 254 



Mr. Galbraith's Determination of the Latitude and Longitude 



of the Observatory of the Calton Hill 257 



Dr. Bigsby's Sketch on the Topography and Geology of Lake 



Ontario 263 



Prof. Encke on Transits 274 



Dr. Foville's Researches on the Anatomy of the Brain ; to which 



is 



