VI CONTENTS OF VOL. XXXVII. — THIRD SERIES. 



NUMBER CCLI.— NOVEMBER. 



Page 

 Mr. R. L. Ellis's Remarks on an alleged proof of the " Method of 

 Least Squares," contained in a late Number of the Edinburgh 

 Review. In a Letter addressed to Professor J. D. Forbes.. 321 

 Mr. P. Clare's Account of some Thunder-storms and extra- 

 ordinary Electrical Phenomena that occurred in the neigh- 

 bourhood of Manchester on Tuesday the 16th of July 1850. 



(With a Plate.) 329 



Mr. J. K. Smythies's Essay on the Theory of Attraction .... 340 



Prof. Graham on the Diffusion of Liquids {concluded) 341 



Mr. H. J. Brooke on the Crystalline Form of Beudantite .... 349 



Prof. Williamson's Theory of JEtherification 350 



Prof. Forbes's Account of a remarkable Meteor, seen Dec. 19, 



1849 357 



Mr. J. J. Sylvester on a new Class of Theorems, and on Pas- 

 cal's Theorem 363 



Mr. J. J. Sylvester on the solution of a System of Equations in 

 which three Homogeneous Quadratic Functions of three un- 

 known quantities are respectively equaled to numerical Mul- 

 tiples of a fourth Non-Homogeneous Function of the same. . 370 

 Mr. J. Glaisher on the Meteorology of England and the South 



of Scotland during the Quarter ending September 30, 1850. . 373 

 Prof. Thomson on a remarkable property of Steam connected 



with the Theory of the Steam-Engine 386 



Mr. J. Napier on the Conductibility of the Earth for Electricity 390 

 Notices respecting New Books : — Mr. T. Tate on the Strength 



of Materials 391 



On the Minerals of the Auriferous Districts of Wicklow, by Wil- 

 liam Mallet, Esq 392 



On Pyroglycerin, by M. Sobrero 394 



Preparation of Sulphurous Acid, by M. Boutigny 394 



On the Alteration which Well-water undergoes, by M. Blondeau 395 

 On Emery, and the Minerals associated with it, by M. J. Lau- 

 rence Smith 396 



On the Identity of the Equisetic, Aconitic and Citridic Acids, 



and on some Aconitates, by M. Baup 397 



On the Production of Succinic Acid by Fermentation, by M. Des- 



saignes 397 



Meteorological Observations for September 1850 399 



Table 400 



NUMBER CCLIL— DECEMBER. 



Prof. Forbes on the alleged evidence for a Physical Connexion 

 between Stars forming Binary or Multiple Groups, deduced 

 from the Doctrine of Chances 401 



Mr. W. H. Barlow's Description of a new Electrical Machine. . 428 



