[ iv ] 
X. On the Organization of the Fossil Plants of the Coal-measures . — Part II. Lycopo- 
diacece , Lepidodendra, and Sigillarice. By W. C. Williamson, F.B.S., Professor 
of Natural History in Owens College , Manchester page 197 
PART II. 
XI. On the Fossil Mammals of Australia. — Part VII. Genus Phascolomys: species 
exceeding the existing ones in size. By Professor Owen, F.B.S. Ac. . . 241 
XII. On the Contact of Surfaces. By William Spottiswoode, M.A., Treas.B.S. 259 
XIII. On the Organization of the Fossil Plants of the Coal-measures. — Part III. Lyco- 
pocliaceae ( continued ). By W. C. Williamson, F.B.S . , Professor of Natural 
History , Owens College, Manchester 283 
XIV. On the present amount of Westerly Magnetic Declination [ Variation of the Com- 
pass] on the Coast of Great Britain , and its Annual changes. By Staff Captain 
Frederick J. Evans, B.N., F.B.S., Hydrographical Department , Admiralty, in 
charge of Magnetic Department 319 
XV. On the Specific Heat and other Physical Characters of Mixtures of Methylic 
Alcohol and Water , and on certain relations existing between the Specific Heat 
of a Mixture or Solution and the Heat evolved or absorbed in their formation. 
By A. Dupre, Ph.D., Lecturer on Chemistry at Westminster Hospital. Commu- 
nicated by William Odling, M.B 331 
XVI. Contributions to Terrestrial Magnetism. — No. XIII. By General Sir Edward 
Sabine, K.C.B., V.P.B.S 353 
XVII. An Experimental Inquiry on the Action of Electricity on Gases. — I. On the 
Action of Electricity on Oxygen. By Sir B. C. Brodie, Bart., F.B.S. . 435 
XVIII. Experiments on the Directive Power of large Steel Magnets, of Bars of magne- 
tized Soft Iron, and of Galvanic Coils, in their Action on external small Magnets. 
By George Biddell Airy, Astronomer Boya-l, C.B., P.B.S. — With Appendix , 
containing an Investigation of the Attraction of a Galvanic Coil on a small 
Magnetic Mass. By James Stuart, Esq., M.A., Fellow of Trinity College, 
Cambridge 485 
Index 499 
