[ iv ] 
VI. Bakerian Lecture. — Series Lines in Spark Spectra. By A. Fowler, F.R.S., 
Assistant Professor of Physics, Imperial College, South Kensington page 225 
VII. Dilute Solutions of Aluminium in Gold. By C. T. Heycock, F.R.S., and 
F. H. Neville, F.R.S. (From the Goldsmiths Metallurgical Laboratory, 
University of Cambridge) .267 
VIII. On the Origin of the Electron Emission from Glowing Solids. By Frank 
Horton, Sc.D. Communicated by Prof. Sir J. J. Thomson, O.M ., 
F.R.S. .277 
IX. On the Lunar Diurnal Variation of the Earth's Magnetism at Pavlovsk and 
Pola (1897-1903). By S. Chapman, B.A., D.Sc., Fellow of Trinity College, 
Cambridge, and Chief Assistant at the Royal Observatory, Greenwich. 
Communicated by the Astronomer Royal, F.R.S. .295 
X. The Capacity for Heat of Metals at Low Temperatures. By E. H. Griffiths, 
Sc.D., F.R.S., and Ezer Griffiths, M.Sc., Fellow of the University of 
Wales . 319 
XI. The Spark Spectrum of Nickel under Moderate Pressures. By E. G. Bilham, 
A.R.C.Sc., B.Sc., D.I.C., Research Student at the Imperial College of Science 
and Technology. Communicated by A. Fowler, F.R.S.. . . . . . 359 
XII. On the Convection of Heat from Small Cylinders in a Stream of Fluid: 
Determination of the Convection Constants of Small Platinum Wires with 
Applications to Hot-Wire Anemometry. By Louis Vessot King, B.A. 
(Cantab.), Assistant Professor of Physics, McGill University, Montreal. 
Communicated by Prof. Howard T. Barnes, F.R.S. .373 
XIII. On Acquired Radio-Activity. By Sir William Crookes, O.M., LL.D., 
D.Sc., Pres.R.S. .433 
Index to Volume 
447 
