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THE ORGANIC CONSTITUENTS OF PLANTS AND VEGETABLE 
SUBSTANCES AND THEIR CHEMICAL ANALYSIS. 
By. Dr: GC, WITTSTELN. 
Authorized Translation from the German Original, Enlarged with numerous additions. 
By BARON FEerp. M. MUELLER, C.M.G., M. & Ph.D., F.R.S.,_ 
Government Botanist for the Colony of Victoria. 
Now Ready. 4to. cloth, with Maps and Illustrations. £2 2s. 
HISTORY OF THE COMSTOCK f@Ime 
By JOHN A. CHURCH, E.M., 
I Professor of Mining in the Ohio State University. 
The Comstock mines are at once the most important sources of silver, the hottest mines 
and the most extensive workings upon one mineral lode in the world. ‘They are opened in > 
a kind of formation which is characteristic of several other mining districts in Western 
America, and the principles of structure which are now recognized there, will undoubtedly 
be applicable to the development of other regions. They are the deepest mines on the 
Crown 8vo. pp. xviii. and 332, stitched in wrapper. Price 145. 
American Continents, and are rapidly becoming the deepest in the world, a shaft having 
already been commenced which is to sink to the depth of six thousand feet. 
The explanation of the principles on which the Lode is formed is supported by maps 
and sections, exhibiting, in the completest manner, the significant points in the structure. 
These maps are based upon the working maps of the mines, with the geology carefully 
laid in after constant and minute survey of the mines during five months’ examination. 
By this method the structure of the great bonanzas which have distinguished this Lode 
above all others is accurately exhibited. 
Just Published. Folded in case 44 inches by 28 inches. Price 2s. 6d. 
NEW OFFICIAL 
Railroad Map of the United States & Canada. 
Folded in cloth case, 26 inches by 36 inches. Price 8s. 6d. 
NEW SECTIONAL 
GEOLOGICAL. MAP OF COLORADO. 
(Scale, 12 miles to the inch.) 
Showing the Eruptive Rocks, Quaternary or Ancient Tirtiary, Post-Cre- 
taceous, Cretaceous, Jura, Trias, Carboniferous, Silurian and 
Metamorphic Rocks. Printed in nine colours. 
In cloth case, 24 inches by 26 inches. Price 4s. 
POCKET, MAP. OF COLORAIGs 
| (Scale 12 miles to the inch.) Coloured by counties. 
¥ 
_ 4to. cloth. Price £2 125. 6d. : 
BUSINESS; ATLAS OF of oE UNITED SLALES: 
| Containing large scale maps of each State and Territory of the United States, the 
| provinces of Canada, West India Islands, etc., etc., together with a complete reference 
| map of the world, printed in colours, producing the clearest typographical effect of any 
known engraved plates, accompanied by a new and original compilation and ready 
reference index, showing in detail the entire Railroad System of North America, the 
Express Company doing business over each road, and accurately locating Counties, 
Parishes, Islands, Lakes, Rivers, Mountains, etc., etc., together with all Post Offices, 
Railroad Stations, and Villages in the United States and Canada, with latest official 
census or estimated population of each. 
LONDON: TRUBNER AND CO., LUDGATE HILL, | 
SS ee ee SE eh) 
NEW SECTIONAL 
| 
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