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 



JT.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. 



r. Nodule oi Puniciliiufn giaiicu/ii. 



Fig. 44. — G\oviV[\ oi Bacterium terino and Pcnicillia in nutrient 

 jelly. 



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



presence of B. ten/to. 

 />. Nodules of Penicillium growing in the track of the needle. 

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



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

 atmosphere ; and the spherical nodule in the jelly represents the 



