VQ bt 
_ THE QUARTERLY 
7 OF SCIENCE, 
AND ANNALS OF. rule, AOS 
4 Aaa. hh 
wh MI [INING, METALLURGY, ENGINEERING, INDUST RIAL. ARTS, 
4 MANUFACTURES, AND TECHNOLOGY. 
EDITED BY 
WILLIAM CROOKES, .FOR:S.,/ -&e. 
No. XLIV. 
OC VOB BE, 1874. 
LONDON: 
: OFFICES OF THE QUARTERLY JOURNAL OF SCIENCE, 
uD HORSE- SHOE COURT, LUDGATE HILL. 
“Where Communications Yor the Editor and Books for Review may be addressed. 
ae % Paris: Leipzig: 
_ FRIEDRICH KLINCKSIECK. ALFONS DURR. 
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