VI CONTENTS. 



Page 



Mr. Bevan on Measuring the Force of Pressure 2!54' 



Mr. Children's Abstract of the Characters of Ochsenheimer's 



Genera of the Lepidoptera of Europe ; &c. {continued) .... 286 

 Mr. Challis on the Determination of the Forms of the Arbitrary 

 Functions which occur in the Integrals of Partial Differential 



Equations 296 



Mr. Haworth's New Account of the Genus Kalanchoe 301 



New Books: — Dr. Clark on the Influence of Climate, &c 305 



Proceedings of the Royal Academy of Sciences of Paris .... 309 



Derivation of the word Theodolite 311 



M. Henry's Preparation of Urea — M. Pouillet on a New Py- 

 rometer — Poisoning by Cheese 312 



M. SeruUas's Bromide of Carbon 313 



Preparation of Piperine — Analysis of Arseniate of Iron — Sugar 



from Starch ,. 314 



Ammonites in Calcedony, from Haytor? — Action of Muriatic 



and Sulphuric Acid upon Hydrocyanic Acid 315 



New Principle obtained from Albumen 316 



New Patents 317 



Meteorological Observations 318 



made by Mr. Booth at the Gar- 

 den of the Horticultural Society at Chiswick, near London, 

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

 Veall at Bostoa 320 



NUMBER XXXV.— NOVEMBER. 



Mr. Galbraith on the Deviation of a Falling Body from the 

 Vertical to the Earth's Surface 321 



Mr. Children's Abstract of the Characters of Ochsenheimer's 

 Genera of the Lepidoptera of Europe; &c. (continued.) , . . . 325 



Prof. Bessel on the Calculations requisite for predicting Occul- 

 ta! ions of Stars by the Moon {continued) 336 



Mr. Ilennell on the Mutual Action of Sulphuric Acid and Al- 

 cohol, and on the Nature of the Process by which iEther is 

 formed 34-2 



MM. Cuvier and DeCandolIe's Opinions on the right Use of 

 Generic Names in Natural History 34-8 



Prof. Schultes on the Cultivation of Botany in England [con- 

 tinued) _ 351 



Mr. Andrews on the Action of a Flame urged by the Blowpipe 

 on other Flames 366 



M. Gay-Lussac on the Action of Potash on Organic Matter. . 367 



M. Le Baron Fourier's Historical Eloge of the Marquis de 

 Laplace 3*70 



Proceedings of the Royal Academy of Sciences of Paris .... 382 



Sketch of the Improvements in Mining: in an Address deli- 

 vered at a Public Meeting at Holywell, by John Taylor, 



Esq.F.R.S 383 



M. Ber- 



