REVIEWS. 547 



turns for information on any of our mineral products. A good index 

 and table of contents add to its value as a work of reference. 



The following subjects are treated by able specialists, many of 

 them in the form of condensed up-to-date monographs : Carborundum, 

 Aluminum, Arsenic, Asbestos, Asphaltum, Bauxite, Cadmium, Cements, 

 The Chemical Industry, Clay, Coal, Copper, Feldspar, Fluorspar, Iron 

 and Steel, Lead, Limestone, Marble, Lime, Lithographic Limestone, 

 Manganese, Marls, Mica, Onyx, Ozokerite, Phosphate Rock, Pyrites, 

 The Rare Elements, Sulphur, Talc and Soaptone, and Zinc. Some of 

 these topics are each treated by several specialists, thus on copper, for 

 example, there are articles by five different writers besides the editor. 



Besides the above there are articles by the editor on Abrasive 

 Materials, Alum, Antimony, Barytes, Bismuth, Borax, Bromine, 

 Chrome Iron Ore, Copperas, Cryolite, Gold and Silver, Graphite, 

 Gypsum, Iodine, Magnesite, Magnesium, Nickel, Peat, Petroleum, 

 Phosphorus, Precious Stones, Quicksilver, Salt, Slate, Sodium, Tin, 

 Tungsten, Whetstones, Scythestones, and Grindstones. 



There are also valuable summaries of the condition of the mineral 

 industry in the following foreign countries : Australasia, Austria- 

 Hungary, Belgium, Canada and other British Colonies, Chile, France, 

 Germany, Greece, Italy, Japan, Norway, Portugal, Russia, Spain, and 

 Sweden. 



A chapter on Miscellaneous Statistics gives the imports and exports 

 of Denmark, 1884-93 '■> Holland, 1880-92 ; Roumania, 1882-93 ; 

 Switzerland, 1885-93; and the imports of Egypt, 1881-93, and 

 Shanghai, 1889-93. The mineral production of the United States, 

 1880-93, and of the United Kingdom of Great Britain and Ireland, 

 1860-92, is tabulated in a convenient form. In the United States 

 five products show a yearly value exceeding $40,000,000, as follows : 



IBQ2. 



Coal, bituminous $124,230,532 $1 18,595,834 



Coal, anthracite 89,727,982 93,091,670 



Pig iron 134,668,035 93,888,309 



Silver, coining value 84,038,500 78,220,450 



Building stone 44,589,500 40,000,000 



Total value of all mineral products 724,821,009 645,084,730 



Nearly all the products show a decrease in value in 1S93 fr° m 

 the production in 7892, the total decrease being $79,736,279. 



In tabular form are given the assessments levied by mining com- 



