[ iv ] 
VII. Galvanic Cells Produced by the Action of Light .— The Chemical Statics and 
Dynamics of Reversible and Irreversible Systems under the Influence of Light. 
(Second Communication.) By Meyer Wilderman, Ph.D., B.Sc. (Oxon.). 
Communicated by Dr. Ludwig Mond, F.R.S . page 335 
VIII. Determinations of Wave-length from Spectra Obtained at the Total Solar 
Eclipses of 1900, 1901 and 1905. By Professor F. W. Dyson, M.A., F.R.S., 
Astronomer Royal for Scotland, Professor of Astronomy in the University of 
Edinburgh. (Member of the Expeditions from the Roycd Observatory, 
Greenwich) . 403 
IX. Researches on Explosives.—Part IV. By Sir Andrew Noble, Bart., K.C.B., 
D.Sc. (Oxon.), D.C.L., F.R.S. . 453 
X. On the Osmotic Pressures of some Concentrated Aqueous Solutions. By the 
Earl of Berkeley and E. G. J. Hartley, B.A. (Oxon.). Communicated by 
W. C. D. Whetham, M.A., F.R.S . 481 
Index to Volume 
509 
