ix 



May 19, 1870. Page 

 A Ninth Memoir on Quantics. By Prof. Cayley, F.R.S 343 



On the Cause and Theoretic Value of the Resistance of Flexure in Beams. 

 By W. H. Barlow, F.R.S 345 



On Deep-sea Thermometers. By Staff-Commander John E. Davis, R.N. . . 347 



On the Chemical Activity of Nitrates. By Edmund J. Mills, D.Sc 348 



On the relative Duration of the Component Parts of the Radial Sphygmo- 

 graph Trace in Health. By A. H. Garrod, of St. John's College, Cam- 

 bridge ! 351 



Spectroscopic Observations of the Sun. — No. VI. By J. Norman Lockyer . 354 



On some Elementary Principles in Animal Mechanics. — No. IV. On the 

 difference between a Hand and a Foot, as shown by their Flexor tendons. 

 Bv the Rev. Samuel Haughton, F.R.S., M.D. Dubl., D.C.L. Oxon., Fel- 

 low of Trinity College, Dublin 359 



Experiments on the effects of Alcohol (Ethyl Alcohol) on the Human Body. 

 By E. A. Parkes, M.D., F.R.S., Professor of Hygiene in the Army Medical 

 School, and Count Cyprian Wollowicz, M.D., Assistant Surgeon, Army 

 Medical Staff 362 



List of Presents 393 



June 2, 1870. 



Election of Fellows 396 



No. 121.— November 18, 1869. 



Preliminary Report of the Scientific Exploration of the Deep Sea in H.M. 

 Surveying-vessel ' Porcupine,' during the Summer of 1869, conducted by 

 Dr. Carpenter, V.P.R.S., Mr. J. Gwvn Jeffreys, F.R.S., and Prof. WyviUe 

 Thomson, LL.D., F.R.S 397 



No. 122.— June 16, 1870. 



On Compounds Isomeric with the Cvanuric Ethers. By A. W. Hofmann 

 and Otto Olshausen 493 



Contributions towards the History of Thiobenzamide. By A. W. Hofmann, 

 LL.D., F.R.S 499 



Contributions to the History of the Acids of the Sulphur Series. — I. On 

 the Action of Sulphuric Anhydride on several Chlorine and Sulphur 

 Compounds. By Henry E. Armstrong, Ph.D 502 



On some of the more important Physiological Changes induced in the Hu- 

 man Economy by change of Climate, as from Temperate to Tropical, and 

 the reverse. By Alexander Rattray, M.D. (Edinb.), Surgeon R.N., 

 H.M.S. 'Bristol' . 513 



Observations on the Mode of Growth of Discoid and Turbinated Shells. By 

 Alexander Macalister, Professor of Zoology, University of Dublin 529 



Contributions to Terrestrial Magnetism. — No. XII. The Magnetic Survey 

 of the British Islands, reduced to the Epoch of 1842-5. By General 

 Sir Edward Sabine, K.C.B., President of the Royal Society 532 



On Supersaturated Saline Solutions. — Part II. By Charles Tomlinson, 

 F.R.S , 533 



