DISTRIBUTION OF 500 COCCI ACCORDING TO PIGMENT PRODUCTION 



as been found i^pQssiple to rep^pduce , exact y by lithography the 

 shades of color produced by the cocci. The fr 



It has 



delicate shades of color produced by the cocci. The frontispiece indicates 

 in a general way the relations of the colors observed. The true colors, 

 characteristic of the commonest types of Aurococcus. Micrococcus, and Rhodo- 

 coccus, can easily be identified by an examination of a series of cultures. 



