

BACTERIA IN *THE DAIRY. SI 
~ No, 40: 
Locality.— Air from Middletown. 
Morphology.—A large micrococcus 1 yz. in diameter. 
Motility.—None. 
elation to Air.—Does not grow under mica plate. 
Temperature.—Grows very slowly at 35°. Color not well developed at this 
temperature. 
Colony on Gelatine.—Not characteristic. 
Gelatine Stab Culture.—Slight needle growth and a slight superficial growth 
which is orange colored. 
Agar-Agar.—A very thick dark orange growth which is quite transparent. 
Potato.—No visible growth, 
Milk.—No effect on milk at any temperature. 
Louillon.—A uniformly slightly cloudy liquid, which clears up after four weeks 
with a sediment. 
No. 51: 
Locality,—Ripened cream from Durham, Conn.* 
Morphology.—A large rod in long chains. Rods with square ends, forming 
large spores in the middle. Size,1.5to.2by .8 4%. When growing on agar the 
chains break up into short rods. 
Motilty.—None. 
Relation to Air.—Will grow under mica plate, but not much except near the 
edge. 
Temperature.—Grows rapidly at 35°, less rapidly at 20°. 
Colony on Gelatine.—A slight liquefying colony forming peculiar characteristic 
contorted masses with the threads arranged in parallel rows. Colony very much 
like that of Proteus. Very characteristic. 
Gelatine Stab Culture.—Growth is slow. A shallow pit is formed which, 
after two or three weeks, liquefies about half an inch of gelatine. The pit is 
always cone shaped and liquefaction never proceeds very far even in the oldest 
cultures. 
Agar-Agar.—An abundant, spreading growth, quite dry and granular, 
and having somewhat the appearance of ground glass. 
Potato.—A dry, velvety white, sometimes even snow-white growth, becoming 
very thick. 
Milk.—Curdles in two days into a Mt, jelly-like mass which is weakly 
alkaline and is rapidly digested into a cloudy, yellowish liquid with an abundant 
sediment. The final digested mass is distinctly alkaline. 
Bouillon.—A clear liquid with a scum forming at the surface which sinks in 
flaky masses when disturbed. 
No. 52. 
Locality.—Cream from Cromwell. 
Morphology.—A minute micrococcus .3 »% in diameter forming chains which 
have a tendency to arrange themselves into rings. 
Motility.—Non-motile. 

* A variety of the same species has been found in snow in Middletown, Conn. 
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