: 1893.] Bacterial Flora of the Atlantic. 411 
direct assimilation or of digestion and assimilation. It includes 
_ the carbon compounds produced by photosyntax and many 
_ other substances, but is not applicable to CO, and H,O, which 
_ ue built into carbohydrates. 
| By these slight yet important changes in terminology we 
- bring ourselves into harmony with the present knowledge of 
animal physiology, and have a much more intelligible and in- 
~ telligent point of view from which to discern further truths 
_ tegarding plant nutrition. 
University of Wisconsin. 
| The bacterial flora of the Atlantic ocean in the vicinity of 
Woods Holl, Mass. 
— Acontribution to the morphology and physiology of marine 
q bacteria. 
HH: th. RUSSEEL, 
WITH PLATE XXXVI. 
(Continued from p. 395) 
General biological features of the different organisms. 
Zymogenic properties. 
: nthe maority of the bacteria isolated at Woods Holl belong 
fe : quefying group of micro-organisms and one of their 
pete actions is demonstrated in the production of a 
‘ ia ‘hee Saeed me that slowly liquefies gelatin. The Spe 
 ketment © Casein in milk cultures also attests the production o 
tones rea change the insoluble proteids into soluble pep- 
- Pathogenic properties. 
. ao frequency with which bacteria are found in oy 
the o- et mud of marine areas, it might be presumed aie 
| Were ; MS in question had no pathogenic pepo: 
—-Presum -Y Saprophytic in their nutritive adaptation. “a 
it hen pO" however is not warranted ona priori grounds and 
a Omes nec 
oO 
 Renic 
.--ssary in working out the full life history of a 
'Sanism to test the relation of the germ as to its path- 
Properties, For this purpose, white rats were inoc- 
mith one ce, of freshly grown bouillon cultures of the 
