



THE 





LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE 

 JOURNAL LdtR SCIENCE. 



CONDUCTED 'Bi - ' 



LORD KELVIN, G.C.V.O. D.C.L. LL.D. F.R.S. Ac. 

 JOHN JOLY, M.A. D.Sc. F.R.S. F.G.S. 



AND 



WILLIAM FRANCIS, Ph.D. F.L.S. F.R.A.S. F.O.S. 



" Nee aranearum sane textus ideo melior quia ex se fila gignunt, nee noster 

 vilior quia ex alienis libamus ut apes." Just. Lips. Polit. lib. i. cap. 1. Not. 



VOL. V.— SIXTH SERIES. 

 JANUARY— JUNE 1903. 



LONDON: 



TAYLOR AND FRANCIS, RED LION COURT, FLEET STREET. 



SOLD BY SIMPKIN, MARSHALL, HAMILTON, KENT, AND CO., LD. — T. AND T. CLARK, 

 EDINBURGH; — SMITH AND SON, GLASGOW ; — HODGES, FIGGIS, AND 



Co., Dublin; — putnam, new yore ; — veuve ,t. botvk \r. 



PARIS; — AND ASHER AND CO., BERLIN. 



79658 



