CONTENTS. «. Vii 



Reply to Mr. Allan's additional Observations on Transition Rocks. By 



Dr. Grierson ggQ 



Critical Analysis of the Memoirs of the Imperial Academy of Sciences at 



Petersburgh, concluded gng 



Proceedings of the Royal Society, Feb. 24, March 3, 10, and I7 302 



■ Linnaean Society, INIarch 1 and 15 304 



Wernerian Society, Jan. £1 and Feb. 12 jbid. 



' Imperial Institute gOQ 



Notices of Lectures giO 



New Properties of Light in Mother-of-Pearl \h\A. 



Method of polarizing Light peculiar to Mother-of-Pearl 311 



Salt sublimed during the burning of Bricks JbJd. 



Precession of the Equinoxes 312 



Method of ascertaining the presence of Manganese 313 



On the Degree of Cold obtained by Professor Braun Jbid. 



On Iodine ibid. 



Basaltic Rock near Nottingham 314 



Of Caoutchouc ([Catheters 315 



jNIethod of preserving Vaccine Matter ibid. 



destroying the Aphides on Apple-Trees 3lg 



Of Mineralogy in Spain 317 



New Patents ibid. 



Scientific Books in hand 3 1 g 



Meteorological Table, F"eb, 1 2 to i\larch 13 3 ig 



NUMBER XVII.— MAY. 



Biographical Account of M. le Comte Lagrange. By M. le Chevalier 



Delambre „„. 



On the Discovery of the Atomic Theory. By Dr. Thomson . . . . . . .'.'.'"" 320 



On the Limits of perpetual Snow in the North. By M. Von Buch, con- 

 cluded ggg 



Account of an Arithmetical Machine. By W. A. Cadelli Esq. ..... 351 



Essay on the Cause of Chemical Proportions. By Dr. Berzelius, concluded 353 



On the Composition of Azote. By Mr. Miers 364 



Astronomical and Magnetical Observations. By Col. Bcaufoy . ". '. . ' ... 372 

 On ihc Dalionian Theory of Definite Proportions in Chemical Combina- 



tions. nyUt.ThovMon, contuiued 37:^ 



Critical An lysis of the Philosophical Transactions forisis,' PaVtii" " 378 



1 rocecd.ngs of the Royal Society, March 24, 31, and April 2\ ....'..'.] S85 



' ■ — Linna^an Society, Aiiril 5 and I9 ggO 



— — — Geological Society, Jan. I and Feb. 18 ibid. 



Cornwall Geological Society, April 9 3S8 



~ — ^ Imperial Institute of France '... . gjjQ 



Notices of Lectures '. ^M 



Queries respecting the flowing of Water in Mines! ......'. 303 



On the Vcniilaiion of Mines .j\L 



Moaning of llic I'rench word Ccnie ^uG 



*'eiiiil:tiion of Coal-Mincs ■^^^\^ 



Mcihfxl of destroying the Aphides on ApplclTr'ecV. ".'.'. S07 



New Paients . " , "/ 



Scientific B(.oks in hand .........'.'..'..'. 'oolj 



Meteorological Table, Marcli' 'l4 to April' I V '.]'.'.\y^['.\'.['.'.^'.'.'.'.'.',',y, ai^y 



I 



