IV 



Page 



The Physiological Action of Atropine, Digitaline, and Aconitine on the 

 Heart and Blood-vessels of the Frog. By Frederic B. Nunnelev, M.D. 

 Lond , 46 



Fourth and concluding Supplementary Paper on the Calculation of the Nu- 

 merical Value of Euler's Constant. By William Shanks 49 



On the Refraction-Equivalents of the Elements. By J. H. Gladstone, Ph.D., 

 F.R.S 49 



On the Structure of the Cerebral Hemispheres. By W. H. Broadbent, M.D., 

 Lecturer on Physiology at St. Marys Hospital Medical School, and Se- 

 nior Assistant Physician to the Hospital, Physician to the Fever Hos- 

 pital 51 



On the Rhizopodal Fauna of the Deep Sea. By William B. Carpenter, 

 M.D., V.P.R.S 59 



Spectroscopic Observations of the Solar Prominences, being Extracts from a 

 Letter addressed to Sir J. F. W. Herschel, Bart., F.R.S. , by Captain 

 Herschel, R.E., dated ' Bangalore, June 12th and loth, 1869 ' 62 



No. 115. — June 17 (continued). 



Some Experiments with the Great Induction-Coil at the Royal Polytechnic. 

 By John Henry Pepper, F.C.S., Assoc. Inst. C.E 65 



On the Mechanical Description of Curves. By W. H. L. Russell, F.R.S. . 72 



Communications received after the Session. 

 Spectroscopic Observations of the Sun. — No. V. By J. Norman Lockyer, 



Researches on Gaseous Spectra in relation to the Physical Constitution of 

 the Sun, Stars, and Nebulae. — Third Note. By E. Frankland, F.R.S., 

 and J. Norman Lockyer, F.R.S 79 



On the Thermodynamic Theory of Waves of Finite Longitudinal Disturb- 

 ance. By W. J. Macquorn Rankine, C.E., LL.D., F.R.SS. Lond. and 

 Edin 80 



Researches into the Constitution of the Opium Bases. — Part III. On the 

 Action of Hydrochloric Acid on Codeia. By Augustus Matthiessen, 

 F.R.S., Lecturer on Chemistry in St. Bartholomew's Hospital, and C. R. 

 A. Wright, B.Sc 83 



On the Action of Cyanogen on Anthranilic Acid. By P. Griess, F.R.S. . . 89 



On the Successive Action of Sodium and Iodide of Ethyl on Acetic Ether. 

 By J. Alfred Wanklyn, F.C.S. &c , 91 



On Approach caused by Vibration. By Frederick Guthrie 93 



November 18, 1869. 



List of Presents 94 



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

 Surveving- Vessel 'Porcupine ' during the Summer of 1869, conducted by 

 Dr. Carpenter, V.P.R.S., Mr. J. Gwyn Jeffrevs, F.R.S., and Prof. Wyville 

 Thomson, LL.D., F.R.S 98 



