CONTtNTS. Vll 



NUMBER CXIX.— JUNE. 



Page 

 Mr. T. G. Tilley on some of the Products of the Action of 



Nitric Acid on Castor Oil 417 



Mr. Detmer on Bleaching Salts 422 



Prof. J. J. Sylvester on a linear Method of Eliminating between 



double, treble, and other Systems of Algebraic Equations. . 425 

 Messrs. \V. Francis and H. Croft's Notices of the Results of 



the Labours of Continental Chemists {continued) 436 



On the Manufacture of Platinum. By a Correspondent. .... 442 

 Mr. J. Marsh on testing for Arsenic and Antimony by Hume's 



Process , 442 



Mr. T. Weaver on the Composition of Chalk Rocks and Chalk 



Marl by invisible Organic Bodies : from the Observations of 



Dr. Ehrenberg {concluded) 443 



Second Letter to Prof. Faraday, from Robert Hare, M.D., 



Professor of Chemistry in the University of Pennsylvania . . 465 

 The Rev. J. Challis on the Principles of the Application of Ana- 

 lysis to the Motion of Fluids 477 



Prof. J. Henry's Contributions to Electricity and Magnetism. 



No. IV. On the Electro-dynamic Induction 482 



Sir David Brewster's Correction of an Error in Prof. Dove's 



Letter on the Law of Storms 514 



Proceedings of the Chemical Society of London 515 



London Electrical Society 520 



■ — — Cambridge Philosophical Society 520 



Geological Society 522 



Meteorological Observations for April 1841 527 



Table 528 



NUMBER CXX.— SUPPLEMENT TO VOL. XVIII, 



Dr. S. Marianini's Examination of a Fourth Experiment ad- 

 duced by Professor Faraday in support of M. de la Rive's 

 'ITieory, and regarded by Dr. Fusinieri to be demonstrative 529 

 Messrs. W. Francis and H. Croft's Notices of the Results of 



the Labours of Continental Chemists {continued) 544 



Proceedings of the Royal Society 547 



Geological Society 561 



Royal Astronomical Society 590 



On the Limit to the Action of certain Chemical Reagents. . . . 604 



Analysis of Anilin 607 



Notice by Prof. Dove respecting the Error in his Letter on the 



Law of Storms, j)ointcd out by Sir David Brewster at p. 514. 608 

 Index , G09 



