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Professor Crookes’s Radiant Matter Tubes ; Apparatus for Science 
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MINERALOGY & GEOLOGY. 
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FOSSILS. — A fine series from the Miocene of Malta, Eocene of Alabama, 
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CATALOGUES POST FREE FOR ONE STAMP. 
Now Completed, by the Publication of the Third Volume. 
A THEORETICAL AND PRACTICAL TREATISE 
ON THE 
MANUFACTURE OF SULPHURIC ACID AND ALKALI. 
WITH THE COLATERAL BRANCHES. 
By George Lunge, Ph.D., F.C.S., Professor of Technical Chemistry 
at the Federal Polytechnic School, Zurich, formerly Manager of the Tyne 
Alkali Works, South Shields. 
Vol. 1. 658 Pages, 309 Illustrations, £1 16s. 
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