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moist, cream-coloured colonies developed a variety of projections, some confluent 
and arborescent, others circular with irregular, curved, radiating arms. A 
yellow-green fluorescence was produced in the medium. . 
On starch plates there was diastatic action and marked green fluorescence 
in the medium. 
On potato a thick, cream-coloured, raised, luxuriant growth developed 
rapidly and soon covered the entire surface of the medium. 
Milk was coagulated quickly with production of acid. Digestion followed, 
a dull, sage-green layer appearing at the surface and leaving a green ring on the 
tube. A strong pungent and cabbage-like odour was produced on this as on 
other media. 
Litmus milk gave parallel results. 
This organism formed acid and gas in dextrose, saccharose and’ glycerin. 
The reaction changed after one week and gas formation ceased, except in glycerin. 
After five weeks, glycerin cultures were strongly acd and were still producing 
gas. 
In broth fluorescence was noted, as well as turbidity, a dense sediment and 
a light pellicle. 
4. Pseudomonas sericea (Mig.) var. fluorescens. 
This organism was a short, thick, gram-negative rod with a single, delicate, 
polar flagellum. 
Gelatin colonies were at first punctate, bluish-white, later becoming definitely 
round. Under the microscope they were coarsely granular with grumose centres 
and a clearly defined margin. .Some of the larger colonies had a few club-shaped 
processes. 
On agar the surface colonies were round and concentric with slightly irregular 
margins. Beneath the surface small, dense, granular, pyramidal colonies were 
numerous. Under the microscope all appeared to have a grumose structure. 
On agar slants a white, lustrous, spreading layer was formed. Growth 
first appeared as discrete, pearly-white colonies (diameter about 1 mm.) which 
later became confluent. The water of condensation was turbid, with a white 
deposit. 
In Gelatin stab cultures, a bowl-shaped depression was first produced, a 
white film lining the cavity. This became broadened until the sides of the 
tube were reached and proceeded in a horizontal layer to the bottom. 
Broth cultures were moderately turbid with a flocculent pellicle and a 
sediment. A negative result was obtained by the indol test. 
Potato cultures had at first a dull slightly granular surface which later 
became smooth, shining and waxy. The colour varied from pink to buff. In 
old cultures the buff tone was constant. 
Litmus was completely reduced in 18 hours and a white pellicle was formed 
on the surface of milk cultures of that age. Digestion began at the surface of 
the medium on the fifth day and was complete in about two weeks. No clotting 
took place. The 1eaction was strongly alkaline. The medium became slimy 
and gradually deepened in colour to a golden-yellow. At the surface a layer 
containing fluorescent pigment was formed. This layer appeared dark-purplish 
by transmitted light and sage-green by reflected light. Shaking produced this 
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