[ xvi ] 
VITI. On the Mechanical Stretching of Liquids: an Experimental Determination of 
the Volume-Extensibility of Ethyl-Alcohol. By A. M. Worthington, M A., 
Professor of Physics and Head Master of the Royal Naval Engineering 
School, Devonport. Communicated by Professor Poynting, E.R.S. . page 355 
IX. The Thermal Emissivity of Thin Wires in Air. By W. E. Ayrton, E.R.S., and 
H. Kilgour. 371 
X. On the Collision of Elastic Bodies. By S. H. Burbury, E.R.S .407 
XI. On the Forces, Stresses, and Fluxes of Energy in the Electromagnetic Field. 
By Oliver Heaviside, F.R.S. . 423 
XII. On the Thermal Conductivities of Crystals and other Bad Conductors. By 
Charles H. Lees, M.Sc. (late Bishop Berkeley Fellow at the Owens College f 
Manchester). Communicated by Professor Arthur Schuster, E.R.S. . 481 
XIII. Researches on Turacin, an Animal Pigment containing Copper. —-II. By 
A. H Church, M.A., E.R.S., Professor of Chemistry in the Royal Academy 
of Arts, London . 511 
XIV. Colour Photometry. — Part TIL By Captain W. de W. Abney, C.B., R.E., 
D.C.L., E.R.S., and Major-General E. It. Festing, R.E., E.R.S. . . . 531 
XV. On the Clark Cell as a Standard of Electromotive Force. By R. T. Glaze- 
brook, M.A., E.R.S., Fellow of Trinity College, and S. Skinner, M.A., 
Christ's College, Demonstrator in the Cavendish Laboratory, Cambridge . 567 
XVI. On the Liquation of Metals of the Platinum Group. By Edward Matthey, 
F.S.A., F.C.S., Assoc. Roy. Sell, of Mines. Communicated by Sir G. G. 
Stokes, Bart., E.R.S . 629 
XVII. Bakerian Lecture. — On the Grand Currents of Atmospheric Circulation. 
By James Thomson, LL.D., E.R.S., Emeritus Professor of Civil Engineering 
and Mechanics in the University of Glasgow . 653 
XVIII. On the Mathematical Theory of Electromagnetism. By Alex. McAulay, 
A LA., Ormond College, Melbourne. Communicated by the Rev. N. M. 
Ferrers, D.D., F.R.S . 685 
Lndex . 
781 
