152 STORRS AGRICULTURAL EXPERIMENT STATION. 
Gelatine stab.—A filiform needle growth, and a flat surface. 
Agar streak.—A filiform, raised, smooth, yellowish growth, not very luxuriant, 
moist. 
Fermentation tubes.—Dextrose and saccharose bouillons are rendered acid. 
There is no gas nor growth in the closed arm in any bouillon. 
Bouillon,—A sediment, a ring-formed pellicle, and a flocculent turbidity. 
Mitk.—Rendered acid, but no other change produced. 
Potato.—A beaded, thick, punctate growth, of a yellow color, not very 
luxuriant. Potato discolored. 
Grows better at 20° than at 37°. Aerobic. 
Ps. pseudo tuberculosis Klein. This organism, isolated by Klein from Lon- 
don milk, was sufficiently well described by him to be inserted here as follows: 
Morphology.—A rod, forming long chains; individual elements I.2u-1.8u x 
‘ .4¢-.5@. Gram stain positive. No spores nor capsules described. 
Gelatine colony.—A white surface colony, somewhat granular, and resembling 
that of B. col. No gas is produced, however. 
Agar streak.—Resembles B. coli, but is less luxuriant. 
Fermentation tubes.—Not described but, doubtless, no acidity nor gas is 
produced. 
Bouillon.—A turbidity and a slight pellicle, but no sediment. 
Milk.—No action on milk. 
Potato.—A thin, crenate, faintly brownish growth, with a whitish-yellow 
margin. 
This is found in 8% of London milk, and is said to be pathogenic for Guinea 
pigs. 
Ps. lactis viridis ns. A Pseudomonas, turning gelatine green. This 
organism has been found only once, in milk from Colchester. 
Morphology.—Size, .gu-I¢ x .4u-.5@. Spores are produced, and there is no 
; capsule. There are no chains, and the Gram stain is negative. 
Gelatine colony.,—A round, raised, smooth, homogeneous colony, entire, yel- 
lowish, moist. 
Gelatine stab,—A needle growth with raised surface. The gelatine is turned 
green. 
Agar streak.—A filiform, raised, smooth, translucent, white growth, quite 
luxuriant, moist; no fluorescence. 
Fermentation tubes.—Dextrose rendered acid and shows growth in closed 
arm. There is no gas. In the other sugar bouillons there is no acidity, gas, 
nor closed arm growth. 
Bouillon.—A flocculent sediment, a pronounced turbidity, but no pellicle. 
Mitk.—Very slightly acid, but no further change. 
Potato.—A filiform, thin, smooth, creamish-colored, moist growth; not very 
luxuriant. Potato discolored. 
Grows at both 20° and 37” ~—‘ Facultative anaerobic. 
