IX 



Experimental Researches in Electricity. Thirtieth Series. By Mi- 

 chael Faraday, B.C. L., F.R.S., &c. (concluded) page 524 



Discussion of the observed Deviations of the Compass in several 

 ships, Wood-built and Iron-built ; with General Tables for facili- 

 tating the examination of Compass-deviations. By G. B. Airy, 

 Esq., F.R.S., Astronomer Royal 527 



Anniversary 527 



On the Determination of the Dew-point by means of the Dry- and 

 Wet-Bulb Thermometers. By Lieut. Noble, R.N., Toronto 528 



On Chemical Affinity, and the Solubility of the Sulphate of Baryta in 

 Acid Liquors. By F. Grace Calvert, Esq 532 



Results of the Examination of certain Vegetable Products from India. 

 Part I. By John Stenhouse, LL.D., F.R.S 536 



On the Representation of Polyhedra. By the Rev. Thomas P. Kirk- 

 man, A.M 543 



On the Action of Sulphuric Acid on the Nitriles and on the Amides. 

 By G. B. Buckton, Esq., and A. W. Hofmann, Ph.D., F.R.S 544 



On the Structure and Development of the Cysticercus Cellulosae, as 

 found in the Pig. By George Rainey, Esq 548 



Further Researches on the Polarity of the Diamagnetic Force. By 

 John Tyndall, Ph.D., F R.S 555 



Address of the President 560 



Obituary Notices of Deceased Fellows : 



Martin Barry, M.D : 577 



Sir Henry Thomas De la Beche, C.B. &c 6H2 



Bryan Donkin, Esq 586 



Charles Frederic Gauss 589 



George Simon Ohm 51)8 



Rear-Admiral Sir William Edward Parry 603 



Richard Sheepshanks, Esq 612 



