OF THE PRINCIPAL BACTERIA 



BACTERIA. (Continued.) 



285 



CULTURE CHARACTERS. 



Liquefying; gray center, 

 wreath - like border ; 

 thick layer on potato. 



In boiled milk a yellow 

 pigment is formed. 



Liquefying; opaque cen- 

 ter, yellow layer next, 

 and the periphery 

 lobed ; funnel-shaped 

 in test-tube. 



On boiled carrots a wrin- 

 kled, gelatinous disk. 



A pellicle formed on sur- 

 face of milk; a heavy 

 precipitate beneath. 



On boiled egg little zoog- 

 lea. 



Resembling a globule of 

 fat ; grows well in mu- 

 cous urine. 



Not liquefying. 



Round colonies with dark 

 center; slow growth; 

 not liquefying. 



Not liquefying; irides- 

 cent yellow surface. 



Not liquefying; center 

 deep violet; color re- 

 mains on agar a long 

 time. 



Liquefying; transparent 

 colonies, surrounded 

 by violet zone. 



ACTIONS. 



Precipitates casein; 

 forms a pellicle on 

 milk. 



Splits urea into am- 

 monii carbonas. 



Peptonizes albumin. 



HABITAT. 



Soil and dust, hay, 

 etc. 



Boiled milk and 

 potatoes. 



vStagnant water. 



Fermenting cheese 

 and milk. 



Connected with 

 putrefaction of 

 plants. 



Boiled carrots. 



Fermenting milk 

 and cheese. 



Putrefying water 

 and boiled eggs. 



Vegetable 



sions. 

 Stale urine. 



infu- 



Bladder. 



Fermenting milk 



Contents of stom- 



ach. 

 Stomach of dogs 



fed on meat. 



Air. 

 Water. 



Boiled potato and 



water. 



Stagnant water. 



DISCOVERER. 



Ehrenberg. 



Ehrenberg. 



Ehrenberg. 

 Duclaux. 



Dujardin. 



Zopf. 



Duclaux. 



Cohn. 



Muller. 

 Miquel. 



Welcker. 

 Duclaux. 



Goodsir. 

 Raczynssky. 



Fliigge. 

 Zopf. 



Schroter. 

 VanTiegham 



