464 MICROORGANISMS IN WATER 



BACILLUS INUNCTUS 



LIQUEFIES GELATINE ! 



Authority. Pohl, ' Ueber Kultur und Eigenschaften einiger Sumpfwasser- 

 bacillen,' Centralblatt f. Bakteriologic,\ol. xi., 1892, p. 143. 



Where Found. In marsh-water. 



Microscopic Appearance. Bacilli about :j-5 /j. long and 0-8 to 4 9ju broad. It 

 is motile. 



Cultures. - 



GELATINE PLATES. Oval or round, smooth-rimmed colonies, whitish in 

 colour, having a shining oily appearance. The gelatine is only slightly 

 liquefied. 



GELATINE TUBES. Forms on the surface a thick shining white expansion, 

 and grows all along the path of the needle in the depth, radiating out at the 

 bottom. Liquefaction only commences after several days. 



AGAR-AGAB. Forms all along the needle's path on the surface a cloudy white 

 growth, whilst the condensed water remains clear. 



POTATOES. Produces a slimy white expansion, which very soon covers the 

 whole surface. 



BACILLUS STOLONIFEBUS 



: LIQUEFIES GELATINE 



Authority. Pohl, ' Kultur der Sumpfwasser-bacillen und Andwendung 

 alkaiischer Kiihrgelatine,' Centralblatt f. Bakteriologie, vol. xi., 1892, p. 

 142. 



Where Found. In marsh-water. 



Microscopic Appearance. Bacillus 1-2 M long and 0-8 /j. broad. Very motile. 



Cultures. 



GELATINE PLATES. Circular colonies with serrated edge, lighter in colour in 

 the centre than at the periphery. 



GKLATINE TUBES. Liquefies the gelatine in the shape of a funnel. Lique- 

 faction commences in twenty-four hours. 



AGAR-AGAR. Forms a thick white growth along the needle streak, expanding 

 radially at the bottom. The condensed water becomes turbid. 



POTATOES. Forms small pin-head growths which lie close together, and, 

 starting from the point of inoculation, very soon spread over the whole surface 

 of the potatoes. 



MILK. --The milk is not coagulated, and no acid is produced. 



