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white scum over the surface. On Agar Streak it produces a white, raised, folded 

 growth. On Agar Plate it forms smooth white colonies with an even outline. The 

 colonies grow both on bottom of plate and on surface of Agar. In Gelatine Stick 

 culture it liquefies the gelatine in a dish-shape growth. It grows along the stick 

 and liquefies the gelatine. On Potato it forms a raised, wrinkled, white growth.* 

 On Lactose Litmus Agar small white colonies grow, which produce lactic acid. 



FORM No. 12. 



Obtained from the air in Mrs. Morley's barn. 



Morphology. A small bacillus 1 to 2" in length and 2" in width. It occurs 

 singly. 



Biological Characters. A liquefying, actively motile, facultative, anivrobic, 

 non-spore-forming bacillus. In Bouillon it produces turbidity in a short time and 

 forms a white sediment in bottom of tube. On Potato it gives a reddish growth 

 extending over surface. On Agar Streak the growth is of a cream color and not 

 very luxuriant. The growth presented an irregular outline and was lined with 

 small white dots near the edge. It produces a white growth all over the surface 

 of Agar at a temperature of 102° F. In Gelatine Stick culture it liquefies the 

 gelatine in a saucer-shape growth, and it grows slightly along the stick. On Agar 

 Plate it forms white, granular colonies with a smooth outline. It grows mostly 

 on the surface of the Agar. On Lactose Litmus Agar large round colonies grow. 

 It produces no change in litmus, showing no lactic acid. 



FORM No 13. 



Obtained from the air in the veterinary hospital. 



Morphology. A short bacillus with round ends. 2^" in length and 1" in 

 width. It occurs in short chains. 



Biological characters. A liquefying non-motile, spore forming, facultative 

 an:erobic bacillus. In Bouillon it produces turbidity and forms a white sediment in 

 bottom of tube. On Agar Streak it forms a light yellow smooth growth with an 

 irregular outline. The growth was near the edge and was of a whiter color than 

 the center. On potato it forms a slick, raised, cream-colored growth along the 

 streak. In Gelatine Stick culture it liquefies the gelatine and forms a white scum 

 over the surface. The growth at temperature of 102° F. is slight and of a white 

 color. On Agar Plate it produces large pearly white colonies with a smooth out- 

 line, which later turned to a brownish color. On Lactose Litmus Agar it forms 

 white colonies which do not produce lactic acid. (See plate.) 



"See Plate. 



