D. Van Nostrand Company 



are prepared to supply, either from 



their complete stock or at 



short notice, 



Any Technical or 



Scientific Book 



In addition to their own extensive 

 list of publications embracing every 

 branch of Science, Technology 

 and Engineering, D. Van Nostrand 

 Company have on hand the largest 

 assortment in the United States of 

 such books issued by American and 

 foreign publishers. 



All inquiries are cheerfully and care- 

 fully answered and complete catalogs 

 sent free on request. 



25 Park Place - New York 



