THE QUARTERLY 
JOURNAL OF SCIENCE, 
AND ANNALS OF 
MINING, METALLURGY, ENGINEERING, INDUSTRIAL ARTS, 
MANUFACTURES, AND TECHNOLOGY. 
EDITED BY 
WJLLIAM CROOKES, F.R.S., &c. 
VOL. VIII. ( s S s .) 
VOL. XV. (O.S.) 
WITH ILLUSTRATIONS ON COPPER, STONE, AND WOOD. 
JlR/\ I v\ ^ 
LONDON : 
OFFICES OF THE QUARTERLY JOURNAL OF SCIENCE, 
3, HORSE-SHOE COURT, LUDGATE HILL. 
FRIEDRICH KLINCKSIECK. | ALFONS DURR. 
Berlin : 
A. ASHER and CO., 53, MOHRENSTRASSE. 
MDCCCLXXVIII, 
