SCIENCE -ADVERTISEMENT 8 



American Standard Hot Air Sterilizers 



Triple Wall Construction, With Regenerative Heating System for Gas, 

 Also Fitted forOil and Electric Heating 



These Sterilizers are constructed on the well-known Lautenschlager principle and have been satis- 

 factorily used for many years. The series is now increased by two large sizes designed particularly for 

 Board of Health work, making four in all. Fully described in pamphlet "American Standard 

 Incubators for Bacteriology" now ready for distribution. 



We are Sole U. S. Agents for the famous Hearson Incubators with Patent Capsule control. 

 Pamphlet now ready for distribution. 



ARTHUR H. THOMAS COMPANY 



IMPORTERS AND DEALERS 



MICROSCOPES, LABORATORY APPARATUS AND CHEMICALS 



1200 WALNUT STREET, PHILADELPHIA 



