THE QUARTERLY » 



JOURNAL OF SCIENCE. 



3MS44- 



EDITED BY 



JAMES SAMUELSON 



AND 



WILLIAM CROOKES, F.R.S. 



VOLUME IV. 



Waty Illustrations on Coppw, Sitooo, ano ^ione. 



LONDON: 



JOHN CHURCHILL AND SONS, NEW BURLINGTON STREET. 



Paris : Leipzig* : 



VICTOR MASSON ET FILS. I ALFONS DURR. 



MDCCCLXVII. 



