548 THE JOURNAL OF GEOLOGY. 



panies 1887-93. The conditions and fluctuations of the stock 

 market at New York, Boston, and London are given in condensed 

 form. 



A new addition to the present volume is a chapter on the Mining 

 Schools of the United States and Canada, in which twenty-four mining 

 schools in the United States and two in Canada are described. State 

 Geological Surveys are given a half page of generalization, which 

 might well be extended to some length, giving specific information of 

 interest and value, or else omitted entirely. 



Chapters on the Progress in Ore Dressing in 1893, The Develop- 

 ment of Views on the Origin of Ores, and Advance in Methods of 

 Stone Quarrying, all by prominent specialists, complete the contents 

 of the volume. 



The portraits and the biographical sketches of some of the leading 

 contributors in the introduction is not the least interesting part of the 

 work. We see nere the familiar features of many prominent workers 

 in economic geology.' 



The one hundred and eleven pages of advertisements are not an 

 attractive feature, and detract from the convenience, appearance, and 

 dignity of the work. The defect might be overlooked if it is only by 

 this means the publishers are enabled to give us so valuable a work of 

 reference, but we surely find no excuse for the nineteen pages of com- 

 plimentary notices bound up in the volume. 



While the second volume did not appear so promptly as the first, ' 

 yet when one considers the size and varied contents of this volume 

 and the vast quantity of statistical matter collected from all quarters 

 of the globe, he cannot help but marvel at the promptness and dis- 

 patch with which Mr. Rothwell, the editor, and Mrs. Braeunlich, the 

 business manager, have put this work on the market. It is practically 

 an up-to-date handbook on the subject, and as such is without a rival 

 in the field. T. C. Hopkins. 



