NUTRIENT JELLY IN TEST-TUBES. 



85 



liquid is a dense amorphous precipitate of a dull yellow colour, passing 

 in older specimens to an orange yellow hue, which consists of anthrax 

 bacilli, produced by the constant longitudinal growth and transverse 

 cleavage of the anthrax rods which were in the first place implanted. 1 



1 r 1 1 



I ■ 



a 



Fig. 41. Fig. 42. 



Fig. 41. — Organism of the rabbit septicemia (bacillus). 



a. Well-marked surface growth. 



Hollowing of surface of gelatine due to evaporation. 



b. Growth along track of needle, also well marked. 



Fig. 42. — Cultivation of micrococci found in vaccine lymph. 

 a. White growth on the surface. (Compare Fig. 40. ) 



Another organism which develops in a distinctive manner in pep- 

 tonised nutrient jelly is the pink yeast plant. It grows most luxuri- 



1 Cp. Klein : Rep. to Med. Off. Local Government Board, 1882. 



