ol. 38. DECEMBER 1869. No. 257. 



Published the First Day of every Month. — Price 2s. 6d. 



THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE, 



AND 



JOURNAL OF SCIENCE. 



Being a Continuation of TillocKs 'Philosophical Magazine? 

 Nicholson's ' Journal/ and Thomson's 'Annals of Philosophy, 9 



CONDUCTED RY 



SIR ROBERT KANE, LL.D. F.R.S. M.R.I.A. F.C.S. 

 AUGUSTUS MATTHIESSEN, Ph.D. F.R.S. F.C.S. 



AND 



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



FOURTH SERIES. 



N° 257.— DECEMBER 1869. 



WITH A PLATE, 



Illustrative of Prof. A. Kenngott's Microscopical Investigation of thin 

 polished Laminae of the Knyahynia Meteorite, and M. Abich's Paper on 

 Hailstorms in Russian Georgia 



LONDON: 



PRINTED BY TAYLOR AND FRANCIS, RED LION COURT, FLEET STREET, 



Printers and Publishers to the University of London. 



Sold by Longmans, Green, Header and Dyer j Kent and Co. ; Simpkin, Marshall and 

 Co. ; Whittaker and Co. ; and H. Bailliere, London : — and by A. and C. Black, and 

 Thomas Clark, Edinburgh; Smith and Son, G-lasgow: — Hodges and Smith, 

 Dublin : — Putnam, New York : — and Asher and Co., Berlin. 



Agency of Smithsonian Institution. 

 WILLIAM WESLEY. 





