SCIENCE— ADVERTISEMENTS 



THIRD EDITION— NOW READY 



AMERICAN MEN OF SCIENCE 



A BIOGRAPHICAL DIRECTORY 



EDITED BY J. McKEEN CATTELL AND DEAN R. BRIMHALL 



The third edition of the Directory contains about 9,600 sketches as compared with 

 4,000 in the first edition and 5,500 in the second edition. The work should be in the hands 

 of all those who are directly or indirectly interested in scientific work. 



(1) Men of science will find it indispensable. It gives not only the names, addresses, 

 scientific records and the like of their fellow workers, but also an invaluable summary of 

 the research work of the country, completed and in progress. 



(2) Those interested in science, even though they may not be professionally engaged 

 in research work, will find much of interest and value to them in the book. 



(3) Executives in institutions of learning and others brought into relations with 

 scientific men will use the book constantly. 



(4) Editors of Newspapers and periodicals will find it to be one of the works of 

 reference that they will need most frequently. 



(5) Libraries will find the book to be a necessary addition to their reference shelves. 



Price, Ten Dollars, Net, Postage Paid 



THE SCIENCE PRESS 



GARRISON, N. Y. LANCASTER, PA. 



READY JULY 10th 



Metallurgy of the Common Metals 



Fifth Edition, Revised and Enlarged 



By LEONARD S. AUSTIN 



Formerly Professor of Metallurgy and Ore-Dressing, 



Michigan College of Mines 



THIS Fifth Edition has been largely rewritten and is in accord with present- 

 day methods in the metallurgy of gold, silver, iron (to the point where 

 pig-iron is obtained), copper, lead and zinc. Underlying principles are 

 clearly set forth, and the details of methods and of metallurgical equipment 

 are given. 



A chapter devoted to questions of the economic situation of the business of 

 metallurgy is also included, dealing with the rapid advance in price and the 

 consequent serious modification of the costs of operation, adds materially to 

 the practical value of the book. 



AUSTIN'S "METALLURGY OF THE COMMON METALS" has 

 615 pages, 6 by 9 inches, and 178 figures. It is cloth-bound — $7.00 postpaid. 

 Enter your order NOW, for a Free Examination copy when issued. 



JOHN WILEY & SONS, Inc. 



432 Fourth Avenue NEW YORK 



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