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THE QUARTERLY 
JOURNAL OF SCI ENCE, 
AND ANNALS OF) |,) |), vAC 
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_ MINING, METALLURGY, ENGINEERING, INDUSTRIAL ARTS, 
MANUFACTURES, AND TECHNOLOGY. 
EDITED BY 
WILLIAM @ROOKES, F:R.S., &c. 
see No. XLVIII. 
ee 
a eer OCTOBER, 1875. 
“LONDON: 
‘ OFFICES OF THE QUARTERLY JOURNAL OF SCIENCE, 
= 3, HORSE-SHOE COURT, LUDGATE HILL. 
| Where Communications for the Editor and Books for Review may be addressed. 
Paris : Leipzig: 
FRIEDRICH KLINCKSIECK. ALFONS DURR. 
Berlin: 
A. ASHER and CO., 53, MOHRENSTRASSE. 
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PRICE FIVE SHILLINGS. 
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