WRITERS' SPKIflCATIONS 



verinS. Are you havlnft irouble in 

 m? Lei me show you how lo over- 

 uble, II is work lor the chemist. 



ICK J. MAYWALD, F.C.S. 



:ONSULTINC CHEMIST 



et Phone, Sia John New York 



TABLE OF CONTENTS 253 

 BUYERS' DIRECTORY 56 



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Edited by HENRY C. PEARSON— Offices, No. 15 West 38th Street, NEW YORK. 



Vol. XLIV. No. 2. 



MAY 1, 1911. 



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