THE QUARTERLY 
POURNAL OF SCIENCE, 
AND ANNALS OF 
MINING, METALLURGY, ENGINEERING, INDUSTRIAL ARTS, 
MANUFACTURES, AND TECHNOLOGY. 
EDITED BY 
WILLIAM CROOKES, F:iR.S.; &c. 
VOL. IV. (22%) 
SERIES. 
VOL; XI. (O:S:) 
WITH ILLUSTRATIONS ON COPPER, STONE, AND WOOD. 
LONDON : 
OFFICES OF THE QUARTERLY JOURNAL OF SCIENCE, 
3, HORSE-SHOE COURT, LUDGATE HILL. 
Paris: Leipzig: 
FRIEDRICH KLINCKSIECK. ALFONS DURR. 
—+ #3903 
MDCCCLXXIV. 
