What a scientific 

 worker says of our 

 Bacteriological Catalog 



"/ am hastening to thank you for 

 the receipt by this morning's mai7 of 

 your catalogue of Bacteriological Appa- 

 ratus. Its completeness and attrac- 

 tiveness would incline me to turn first 

 to it for help in making out my orders 

 even i'' I did not know by experience 

 that your service is the most satis^ic- 

 tory which I have thus far received from 

 any concern." 



Owing, to cost of production of 

 this catalogue and in order to 

 obtain for it the best possible dis- 

 tribution, copies are limited to 

 institutions and laboratories hav- 

 ing having need for this particu- 

 lar publication. 



^i)t mm Corporation 



Laboratory Apparatus - Chemicals 



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ROCHESTER, N. Y. 



INTERNATIONAL 

 CENTRIFUGES 



INTERNATIONAL 

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352 Western Ave. (Brighton) 

 BOSTON, MASS. 



CntHloti Gy. on request 



COLORIMETRIC DETERMINATIONS 



We are offering 



INDICATORS 



Covering a Continuous Range from Ph 1 .2 to Ph 9.8 



Al 



so 



COLOR COMPARISON TUBES 



From Ph 6.6 to Ph 8.6 



Literature Upon Request 



HYNSON, WESTCOTT & DUNNING 



BALTIMORE 



