On Certain Bacteria from the Air of New York City. 365 



Very small bacilli ; not motile 74 



Chroniogenic. 



A greenish fluorescence 75 



Color orange-yellow, growth skinny 76 



Color orange or brownish, giowth soft 77 



Color yellow (see 104 to 107). 

 Lactose-litmus reddened ; chroniogenic ; not motile. 



Growth thin, translucent, reddish Avhere thick 78 



Growth yellow, rather opaque 79 



Milk coagulated ; always so on boiling. 

 Lactose-litmus reddend. 



A green fluorescence ; also a black pigment in presence of sugar 80 

 Not fluorescent ; more or less chroniogenic. 



Motile 81 



Not motile. 



Growth ocherous, faintly chroniogenic 82 



Growth translucent salmon-pink 83 



Growth brownish red or dark orange-red 84 



Lactose-litmus reddened. 



Chroniogenic ; yellow 85 



Not chromogenic. 



No complete surface skin on broth. 



Growth white, marked with more opaque white 86 



Growth very thin and ti-anslucent 87 



A wrinkly surface skin on broth. 



Spore-bearing cells wider than vegetative ones 88 



Cells alike, the spore-bearing ones distended by the spores. 89 

 Nitrate reduced, at least partially in twenty-eight days. 

 Milk coagulated, especially so on boiling. 

 Growth white, waxy, dotted or feathery. 



Growth rather thin, gTanular, dotted or punctate 90 



Growth more opaque like ground glass, more or less feathery. 



Growth subcrystalline, finely angularly marked 91 



Growth scarcely more than finely granular, uniform. 



Not, or but slightly ^\-i-inkly 92 



With transverse, convex folds or Avrinkles 93 



Growth rather opaque, feathery, with concave creases 94 



Growth very thin, spreading 95 



Chroniogenic, sometimes only faintly so. 

 Color ocherous. 



Long, slender bacilli 96 



Very small, short bacilli (see 77). 

 Color pinkish red, rarely white. 



Growth viscous 97 



Growth not viscous 98 



Annals N. Y. Acad. Sci., VIII. , May, 1895.— 26 



