LABORATORY APPLIANCES. 



We are issuing this month a special edition of the 

 "Scientific Drummer" devoted to 



Caborafory Glassware 



IT'S FREE. ASK FOR IT. 

 Located in THE "CITY OF LABORATORIES." 



7!lA PENN AVENUE, 

 PITTSBURGH, - - PENNSYLVANIA. 



Our new Catalogue will be ready in July. 



The Post Express Printine Comsaay, 

 Rochester, N. Y. 



