536 H. J. CONN 



this work but there is reason to beUeve that it is carefully pre- 

 pared and cursory examination of slides stained with it by the 

 gram technic indicates that it is as satisfactory as the Du Pont 

 product. In this connection it should be remarked that the Du 

 Pont Company does not sell crystal violet except in bulk, whereas 

 the National AniUn Company is now making a speciaUty of 

 biological stains and sells them in small containers. If the 

 Du Pont product is desired, it should be ordered through some 

 supply house that can be trusted to supply the actual products 

 specified. 



REFERENCES 



BtjRKE, V. 1922 Notes of the Gram stain with description of a new method. 



Jour. Bact. 7, 159-182. 

 Conn, H. J. 1922 An investigation of American stains. Report of committee 



on bacteriological technic. Jour. Bact. 7, 127-148. 



