PLATE 4» 
A. —Photomicrograph of a bead of hardened exudate dissolving in water under 
microscope. The granular effect is due to the bacteria which quickly diffuse at the 
margins. 
B. —Five-day-old agar slant cultures of Bact. translucens incubated at 24 0 C. a, On 
peptone beef agar. 6, On potato agar. Upon the latter medium the organism grows 
profusely and in a characteristic manneV—viz, growth heaps up abundantly, is slightly 
more watery, and a little lighter in color than on peptone beef agar. 
C. —Colonies of Bact. translucens on peptone-beef agar plate, dilution culture from 
bouillon, photographed by semidirect lighting to show characteristic internal some¬ 
what irregular concentric striations. X sK* 
