SCIENCE—ADVERTISEMENTS 



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A SIGN OF QUALITY 



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A MARK OF SERVICE 



Advancement of Science 



and the development of scientific instruments go hand in hand. 

 New scientific discoveries make new instruments necessary and 

 new instruments make further discoveries possible. 



When we get through 



making scientific apparatus — if we ever get through^ — ^we hope 

 to have made the name WELCH to stand for a standard of 

 quality that has not been surpassed. 



To attain the highest 



possible standard of service is the purpose that dominates all 



other considerations in the designing and building of WELCH 



Laboratory Apparatus and Supplies. 



CATALOGS ON REQUEST 



(A) Agriculture (B) Biology (C) Chemicals (G) Physics 

 (5C) General School Supplies 



A SIGN OF QUALITY 



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A MARK OF SERVICE 



W. M. WELCH SCIENTIFIC COMPANY 



Manufacturers, Importers and Exporters of Scientific Apparatus 

 and School Supplies 



1516 Orleans Street CHICAGO, ILL., U. S. A. 



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