396 ScientiJiG Intelligence. 



4. TTie Mineral Industry, its Statistics^ Technology and Trade 

 in the United States and other countries to the end of 1895. Vol. 

 IV. Edited by Kichakd P. Rothwell. 849 pp. 8vo. 1896. 

 New York and London (The Scientific Publishing Company). — 

 This fourth volume of the Mineral Industry, published under the 

 auspices of the Engineering and Mining Journal, brings the sub- 

 jects discussed down to the close of 1895. The editor-in-chief is 

 Mr. Richard P. Rothwell, but he has had the assistance of a large 

 corps of helpers in the different departments. The many who 

 have used to advantage the earlier volumes of this series will 

 remember that it gives not only a summary of the condition of 

 each industry with respect to amount of material mined at dif- 

 ferent points, both in this country and abroad, but also a synop- 

 sis of the course of the prominent markets, as at New York and 

 London ; also in many cases an account is given of the treatment 

 of ores. Special chapters discuss related topics of interest, as 

 the evolution of the anthracite coal trade*; labor, wages and acci- 

 dents in mining ; the depth to which it is plausible to think that 

 mining operations may be carried in the future ; the application 

 of electricity to mining, etc. 



5. The Botanical Gazette. Editors, John M. Coulter, The 

 University of Chicago, III., Charles R. Barnes, University of 

 Wisconsin, J. G. Arthur, Purdue University ; Associate Editors, 

 George I. Atkinson, Cornell University, Volney M, Spalding, 

 University of Michigan, Boland Thaxter, IIar\:)ard University, 

 William Trelease, Missouri Botanical Garden. Chicago, III. 



Published by the University of Chicago. — It gives us great 

 pleasure to note the substantial improvement by which this excel- 

 lent journal is made to take an assured place in the front ranks of 

 periodical scientific literature. It has been carried steadily for- 

 ward by the energy and self-denial of its early projectors, under 

 serious discouragements arising from slender pecuniary sup- 

 port and the lack of a permanent home. Happily, its founder 

 and two of its early editors have adhered to it through days of 

 trial, and they now have the justifiable satisfaction of seeing it 

 accepted as an official publication of Chicago University, enlarged 

 in scope, enlisting the services of four associate editors, and com- 

 manding the respect of botanists throughout the world. From 

 the outset the editors have evinced good judgment in securing 

 for the Gazette illustrations of high order and in insisting on 

 good typographical execution. In the new volume, beginning 

 with July of this year, the same severe taste is manifest, with the 

 result of giving us a technical journal of which every American 

 botanist may feel proud. G. l. g 



6. The Dualistic Theory of Descent. — This is the name given 

 by Sachs to a suggestive hypothesis concerning derivation, which 

 he has presented in Flora [Marburg) during recent numbers, 

 the last of which bears date of June 3, in the issue for July 4. 

 The style possesses the charm which has rendered all of the writ- 

 ings of Sachs agreeable reading and leads the reader often to give 



