JOURNAL OF BACTERIOLOGY 



INTERNATIONAL 

 CENTRIFUGES 



Latest model, self -balancing cen- 

 trifuge with brake and brush re- 

 lease, and removable top adapted 

 to use with perforated basket. 



International Equipment Co. 



352 Western Avenue (Brighton) 

 Boston 35, Mass. 



Catalogue Cy tent on Requttt 



CULTURE MEDIA 



IN HERMETICALLY SEALED TUBES 



.These Culture -Media in hermctifally 

 sealed tubes, 14x150 mm, are cotton 

 plugged so that when a tube is broken 

 at the scored mark a cotton plugged, 

 sterile tube of media is ready for use. 

 Securely packed in cartons and pack- 

 aged in cartons of twelve tubes. 



The slants are excellent for making pre- 

 liminary inoculations, bu may be em- 

 ployed equally well in laboratory rou- 

 tine. Made according to latest methods 

 of a 6sed concentration or reaction. 



These tubes possess the ad\antage that 

 the media cannot dry out or spoil, since 

 evaporation or contamination cannot take place as in 

 ordinary tubes. Being securely packed no special pre- 

 cautions as to storage need be taken. 



Tubes ordinarily packed to contain approximately 10 re 

 of culture media. Price $1.50 per dozen. Special dis- 

 counts on larger quantities. 



Any culture media in amounts up to 12 cc can be sup- 

 plied at same price. 



WilTTorporation 



PpoducU for Every Laboratory 



Ouarantecd Mlhout Reservation 



R ochester . ^ - Y 



BIOLOGICAL STAINS 



A Complete List for Bacteriology, Pathology, Zoology, 

 Josinl Botany, Etc. 



CHEMICAL INDICATORS 



Indicators for Every Purpose, including the Hydrogen-Ion 

 Indicators (Clark and Lub's List, Sorensen's List, Etc.) 



FINE ORGANIC CHEMICALS 



Especially Prepared for Laboratory Use. 



Write for our NEW CATALOGUE giving the entire list, together with Methods for 

 Staining, Solubilities, Indicator Chart, Etc. 



Coleman & Bell Products may be secured from Laboratory Supply Houses through- 

 out the United Slates and in Foreign Countries, or may be ordered direct. 



The Coleman & Bell Company, Norwood, Ohio, U. S. A. 



Formerly National Stain & Reagent Co. 



