Page 



Further Researches into the Colouring-matters of Human Urine, with 

 an Account of their Artificial Production from Bilirubin, and from 

 Hsematin. By Charles A. MacMunn, B.A., M.D 206 



Note on the Determination of Magnetic Inclination in the Azores. By 

 T. E. Thorpe, Ph.D., F.RS 237 



On Heat Conduction in Highly Earefied Air. By William Crookes, 

 F.RS 239 



On the Thermo-Electric Behaviour of Aqueous Solutions with Platinum 

 Electrodes. By G. Gore, LL.D., F.RS 244 



Influence of Voltaic Currents on the Diffusion of Liquids. By G. Gore, 

 LL.D., F.RS 250 



Experiments on Electric Osmose. By G. Gore, LL.D., F.R.S 253 



List of Presents 257 



Microscopical Researches in High Power Definition. By G. W. Boyston- 

 Pigott, M.A., M.D. Cantab., F.RS. (Plates 3, 4) 260 



No. 209.— January 6, 1881. 



Researches on the Minute Structure of the Thyroid Gland. By E. Cress- 

 well Baber, M.B. Lond 279 



Note to the Paper on the Structure of the Immature Ovarian Ovum in 

 the Common Fowl and in the Rabbit. By E. A. Schafer, F.RS 282 



Note on a Communication made to the Eoyal Society by Professor 

 Roscoe, LL.D., F.E.S.. " On the Absence of Potassium in Protagon 

 prepared by Dr. Gamgee." By J. L. W. Thudichum, M.D., F.RC.P. 

 Lond 282 



Preliminary Note on the Existence of Ice and other Bodies in the Solid 

 State at Temperatures far above their ordinary Melting Points. By 

 Thomas Carnelley, D.Sc, Professor of Chemistry in Firth College, 

 Sheffield 284 



On the Effects of Heat on the Chloride, Bromide, and Iodide of Silver, 

 and on some Chlorobromiodides of Silver. By G. F. Eodwell, F.E.A.S., 

 F.C.S., Science Master in Marlborough College 291 



Phenomena of the Capillary Electroscope. By G. Gore, LL.D., F.E.S 295 



Electric Currents caused by Liquid Diffusion and Osmose. By G. Gore, 

 LL.D., F.RS 296 



Additional Note to a Paper " On the Thermal Conductivity of Water." 

 By J. T. Bottomley, Lecturer in Natural Philosophy, and Demonstrator 

 in Experimental Physics in the University of Glasgow 300 



January 13, 1881. 



On the 48 Co-ordinates of a Cubic Curve in Space, 

 woode, M.A., D.C.L., President RS 



By William Spottis- 

 301 



