REPORT OF COMMITTEE ON DESCRIPTIVE CHART 141 



not included in the group number. This margin together with 

 the group number constitute a brief characterization of the 

 organism — a summary of the tests outlined above. 



REFERENCES 



American Public Health Association. 1916 Standard methods for the examina- 

 tion of water and sewage. 

 American Public Health Association 1917 Standard methods of bacteriological 



analysis of milk. Am. J. Pub. Health, 6, 1315-1325. 

 Bronfenbrenner, J. J. 1919 J. Med. Research, 39, p. 25. 

 Clark, W. M. and Ltjbs, H. A. 1917 a The colorimetric determination of 



hydrogen-ion concentration. J. Bact. 2, 1-34, 109-136, 191-236. 

 Clark, W. M. and Ltjbs, H. A. 1917 b A substitute for litmus for use in milk 



cultures. J. Agric. Research, 10, 105-111. 

 Morishima, K. 1920 Phenol red china blue as an indicator in fermentation 



tests of bacterial cultures. J. Inf. Dis. 26, 43-44. 

 Rothberg, W. 1917 Observations on some methods for the study of gelatine 



liquefaction. Read before Soc. Amer. Bacteriologists, December, 1917. 



See Abs. Bact. 2, 12. 



Glossary of Terms Used on the Chart 



Adherent, Applied to sporangium wall, indicates that remnants of sporangium 



remain attached to endospore for some time. 

 Aerobic, growing in the presence of free oxygen; strictly aerobic, growing only 



in the presence of free oxygen. 

 Amorphous, without visible differentiation in structure. 

 Anaerobic, growing in the absence of free oxygen; strictly anaerobic, growing 



only in the presence of free oxygen; facultative anaerobic, growing both 



in presence and in absence of free oxygen. 

 Arborescent, branched, tree-like growth. 

 Beaded, (in stab or stroke culture) disjointed or semi-confluent colonies along the 



line of inoculation. 

 Bipolar, at both poles or ends of the bacterial cell. 

 Brittle, growth dry, friable under the platinum needle. 

 Butyrous, growth of butter-like consistency. 

 Chains, four or more bacterial cells attached end to end. 

 Chromogenesis, the production of color. 

 Ciliate, having fine, hair-like extensions, resembling cilia, sometimes not visible 



to the naked eye. 

 Clavate, club-shaped. 



Coagulation, the separation of casein from whey in milk. 



Contoured, an irregular, smoothly undulating surface, like that of a relief map. 

 Convex, surface the segment of a sphere. 

 Crateriform, a saucer-shaped liquefaction of the medium. 

 Cuneate, wedge-shaped. 



THE JOURNAL OF BACTERIOLOGY, VOL. V, NO. 2 



