198 REVIEWS 



Carboniferous floras. Of the 122 species contained in the collections 



from the three Heraclean stages not more than eleven are unknown 



in Europe or America. ^ 



r David White. 



Ge'ologie et mine'ralogie appliquees. Les mineranx utiles et leur gise- 

 me?its. Par Henri Charpentier. Pp. 643+xi; illustrated, 

 i2mo. Paris, 1900. 



This volume forms a part of the Bibliotheque du Conducteur de 

 Travaax Publics of France, and is published under the auspices of the 

 ministers of public works, of agriculture, of public instruction, of 

 commerce and industry, etc. Its title-page is followed by the Comite 

 de patronage, a list of thirty-nine prominent government officials, and 

 by the editing committee with twenty-seven additional and equally 

 distinguished names; then comes a preface written by the chief engi- 

 neer of mines. 



A work upon economic geology, introduced with these impressive 

 formalities and distinguished approvals, one naturally expects to find 

 of unusual merit and importance. The general -plan of the work is 

 very like that followed by Fuchs and De Launay in their large and 

 excellent Traite des Gites miner aux et metalliferes, published in 1S93 ; 

 but this work by Charpentier is evidently intended to be more elemen- 

 tary and for a less instructed class of readers. 



The first seventy-four pages are devoted to general geology, min- 

 eralogy and paleontology. In the second part the economic-geologic 

 subjects are taken up in the following order : 



(1) Building materials, (2) Metallurgical minerals, (3) Carbon and 

 its compounds, (4) Fertilizers, (5) Miscellaneous minerals, (6) Rare 

 metals, (7) Precious stones. 



These topics are properly subdivided and treated separately, and 

 at the end of each discussion is a list of bibliographic references that 

 varies in length from one to thirty or more titles chronologically 

 arranged. The economic geology of France naturally occupies the 

 first place, but those of other countries are also treated at such length 

 as to lead one to suppose that the book was expected to be useful 

 outside of France. 



The bibliography given after each topic will appeal to busy read- 

 ers as especially useful. In the preface it is stated that this bibliogra- 

 phie fort complete will do away with tiresome searching for literature by 



