LONDON, EDINBURGH, AND DUBLIN PHILOSOPHICAL MAGAZINE AND JOURNAL OF SCIENCE. CONDUCTED BY SIR OLIVER JOSEPH LODGE, D.Sc., LL.D., F.R.S. AND WILLIAM FRANCIS, F.L.S. "Nec aranearum sane textus ideo melior quia ex se fila gignunt, nec noster VOL. XXXIV.—SIXTH SERIES. LONDON: TAYLOR AND FRANCIS, RED LION COURT, FLEET STREET SOLD BY SIMPKIN, MARSHALL, HAMILTON, KENT, AND CO., LD. |