PROCEEDINGS OE 



THE EOYAL SOCIETY. 



vol. xix. No. 127. 



CONTENTS. 

 March 2, 1871. 



PAGE 



I. Further Experiments on the effect of Diet and Exercise on the Elimination 



of Nitrogen. By E. A. Parses, M.D., F.E.S 349 



II. Magnetic Observations made during a Voyage to the North of Europe and 

 the Coasts of the Arctic Sea in the Summer of 1870. By Capt. I VAN 

 Belavenetz, I.E.N., Director of the Imperial Magnetic Observatory, 

 Cronstadt. In a Letter to Archibald Smith, M.A., LL.D., E.E.S. . . 361 



March 9, 1871. 



I. Eesults of Seven Years' Observations of the Dip and Horizontal Force at 

 Stonyhurst College Observatory, from April 1863 to March 1870. By the 

 Eev. S. J. Perry 368 



II. Preliminary Notice on the Production of the Olefines from Paraffin by Dis- 

 tillation under Pressure. By T. E. Thorpe, Ph.D., Professor of Chemistry 

 in Anderson's University, Glasgow, and John Young 370 



III. Contributions to the History of the Opium Alkaloids. Part I. — On the 



Action of Hydrobromic Acid on Codeia. By C. E. A. Wright, D.Sc. . 371 



March 16, 1871. 



I. Description of Ceratodus, a genus of Ganoid Fishes, recently discovered in 

 rivers of Queensland, Australia. By Albert G-unther, M.A., Ph.D., 

 M.D., F.E.S 377 



II. On the formation of some of the Subaxial Arches in Man. By GrEORGE W. 

 Callender, Assistant Surgeon to, and Lecturer on Anatomy at St. Bar- 

 tholomew's Hospital 380 



March 23, 1871. 



I. Experiments on the Successive Polarization of Light, with the description of 



a new Polarizing Apparatus. By Sir Charles Wheatstone, F.E.S. . 381 



II. On an approximately Decennial Variation of the Temperature at the Obser - 

 vatory at the Cape of Grood Hope between the years 1841 and 1870, viewed 

 in connexion with the Variation of the Solar Spots. By E. J. Stone, 

 F.E.S., Astronomer Eoyal at the Cape of Grood Hope. In a Letter to the 

 President .389 



III. Eesume of two Papers on Sun-spots : — " On the Form of the Sun-spot 

 Curve," by Prof. Wole ; and " On the Connexion of Sun-spots with 

 Planetary Configuration," by M. Fritz. By B. Loewy 392 



For continuation of Contents see 1th page of Wrapper. 



