Vll 



Preliminary Notice on the Production of the defines from Paraffin by Dis- 

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

 in Anderson's University, Glasgow, and John Young 870 



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

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



March 16, 1871. 



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

 rivers of Queensland, Australia. By Albert Giinther, M.A., Ph.D., 

 M.D., F.R.S 377 



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

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

 tholomew's Hospital 380 



March 23, 1871. 



Experiments on the Successive Polarization of Light, with the description 

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



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

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

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

 Stone, F.R.S. , Astronomer Royal at the Cape of Good Hope. In a 

 Letter to the President 389 



Resume" of two Papers on Sun-spots: — "On the Form of the Sun-spot 

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

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



-March 30, 1871. 



Experiments in Pangenesis, by Breeding from Rabbits of a pure variety, 

 into whose circulation blood taken from other varieties had previously 

 been largely transfused. By Francis Galton, F.R.S 393 



Contributions to the History of Orcin. — No. I. Nitro-substitution Com- 

 pounds of the Orcins. By John Stenhouse, LL.D., F.R.S., &c 410 



List of Presents 418 



No. 128.— April 20, 1871. 



Note on the circumstances of the Transits of Venus over the Sun's Disk in 

 the years 2004 and 2012. By J. R. Hind, F.R.S 423 



On the Existence and Formation of Salts of Nitrous Oxide. By Edward 

 Divers, M.D 425 



Research on a New Group of Colloid Bodies containing Mercury, and cer- 

 tain Members of the series of Fatty Ketones. By J. Emerson Reynolds, 

 Member of the Royal College of Physicians, Edinburgh, Keeper of the 

 Mineral Department, and Analyst to the Royal Dublin Society 431 



April 27, 1871. 



The Bakerian Lecture. — On the Increase of Electrical Resistance in Con- 

 ductors with rise of Temperature, and its application to the Measure 

 of Ordinary and Furnace Temperatures ; also on a simple Method of 

 measuring Electrical Resistances. By Charles William Siemens, F.R.S, 

 D.C.L 443 



