868 THE JOURNAL OE GEOLOGY. 
from the Niagara, and one, found in the drift, is supposed to be from 
the Devonian. 
_ The paper is a real contribution to our knowledge of the faunas of 
Wisconsin and the Northwest. 
Save 
The Mineral Industry. Its Statistics, Technology and Trade in the 
United States and Other Countries to the end of 1894. Vol. IX1., 
pp. 770 + xxviii + 111 (adv.). The Scientific Publishing 
Co., New York and London, 1895. 
The third volume of Zhe Mineral Industry is a worthy successor to 
the two preceding volumes. ‘The general form and make-up is the same 
as volume two, yet there are several new subjects and new contributors 
while some of the former ones do not appear. Each volume of this 
publication is complete in itself and at the same time a supplement to 
the preceding volumes and in no sense a duplication of them. 
‘As the name indicates, it is not simply a compilation of statistics, 
but contains up-to-date scientific articles on the different subjects, written 
by able specialists. They are all treated, for the most part, from the stand- 
point of the tradesman. The volumes form a valuable text-book in 
economic geology, serviceable alike to teacher, student and tradesman. 
Besides the figures of production there are given the localities, the 
markets, their geologic relations, and the most improved methods of 
mining and manufacturing. 
The following subjects are treated in the present volume: Abrasives 
Aluminum, Alum, Antimony, Asbestos, Asphaltum, Barytes, Bauxite, 
Borax, Bromine Cement, The Chemical Industry, Chrome Ore, Clay, 
Coal, Copper, Cryolite, Fertilizers, Fluor spar, Gold and Silver, Graph- 
ite, Gypsum, Iron and Steel, Lead, Magnesite, Manganese, Mica Min- 
eral Paints, Monazite, Nickel, Petroleum, Pyrites, Precious Stones, 
Quicksilver, Rare Elements, Salt, Slate, Stone, Sulphur, Tin and 
Zinc. 
The condition of the mineral industry in the different foreign coun- 
tries is given in separate chapters. There are also articles on Mining 
Stocks, Electrical ‘Transmission of Power in Mining, Progress in Ore 
Dressing, Electro Plating, Metallic Oxides, Mining Law and Mineral 
Development. 
As far as possible everything is arranged alphabetically, with numer- 
ous valuable tables and summaries, and a complete index both to the 
