NUTRIENT JELLY IN TEST-TUBES. 



87 



from it in all directions. This is at once recognised by its method 

 of growth as a specimen of one of the cheese moulds (Penicillium 



J.T.T. 



Fig. 43. Fig. 44. 



Fig. 43. — Impure cultivation of B. anthracis in nutrient jelly. 



a. Upper portion of jelly, liquefied. 



b. Sediment of B. anthracis. 



c. Nodule of Penicillium glaucum. 



Pig. 44. — Growth of Bacterium termo and Penicillia in nutrient 

 jelly. 



a. Liquefied portion of jelly with opalescent green tinge, due to 



presence of B. termo. 



b. Nodules of Penicillium growing in the track of the needle. 

 N.B. — The jelly was inoculated with a non-sterilised needle. 



glaitcum), the spores of which are almost universally present in the 

 atmosphere ; and the spherical nodule in the jelly represents the 



