PROCEEDINGS OF 

 THE ROYAL SOCIETY. 



VOL. LILT. 



No. 324. 



CONTENTS. 



PAGE 



Account of the appropriation of the sum of £4,000 (the Government Grant) 

 annually voted by Parliament to the Eoyal Society, to be employed in 

 aiding the Advancement of Science (continued from vol. 1, p. 246). 

 November 30, 1891, to March 31, 1893 3i8 



Report of the Kew Committee for the Year ending December 31, 1892 . . 322 



April 20, 1893. 



I. Magnetic Viscosity. By J. Hopkinson, D.Sc., F.R.S., E. Wilson, and 



F. Ltd all 352 



II. On the Spectrum of Thallium, and its Relation to the Homologous 



Spectra of Indium and Gallium. By Henry Wilde, F.R.S. . . 369 



III. The Potential of an Anchor Ring. By F. W. Dyson, M.A., Fellow of 

 Trinity College, Cambridge, Isaac Newton Student in the University 

 of Cambridge . . . . . . . . . 372 



IY. Analogy of Sound and Colour. — Comparison of the Seven Colours of the 

 Rainbow with the Seven Notes of the Musical Scale, as determined by 

 the Monochord, and of the Wave-lengths of Colour and Sound. By 

 J. D. Macdonald, M.D., F.R.S. {Title only'] 375 



List of Presents . . . . . . . • • • 376 



For continuation of Contents see 2nd page of Wrapper. 



Price Two Shillings and Sixpence. 



July 14, 1893. 



