94: SUMMARY OF CDEBENT RESEARCHES RELATING TO 



creamy white, ultimately becoming brownish-yellow. There is practically 

 no growth in nitrate bouillon at 37°. V. denitrificam is a budding fungus ; 

 and as it simulates a bacterium the term Mycobacterium denitrificans 

 would be more appropriate. It does not form true branchings, unless 

 we agree to call everything within a single capsule an organism ; and 

 this would be unwise. The branching is caused by the capsules and 

 not by the simple organisms. 



Corynebacterium. lymphse vaccinalis.* — Levy and Fickler found 

 two microbes in animal lymph, one of which produced on Loeffler's 

 blood-serum an orange-yellow pigment. Neither organism formed any 

 demonstrable toxin in the cultures. In young cultures the bacteria 

 were wedge-shaped or cylindrical, becoming bent with increasing age, 

 and exhibiting a granulation of their protoplasm, and finally became 

 club-shaped. The last-named forms developed on egg-white and egg- 

 yolk plates. They were stainable by Gram's method, but did not ex- 

 hibit the granules with Neisser's staining. They grew well at 37° and 

 badly at 21°. On gelatin the colonies were opaque. On agar the deep- 

 lying growth was brownish and small, the superficial layer granular 

 and with yellowish-brown centre. Bouillon was rendered turbid by 

 one, while the other formed a collection of spherules ; both produced 

 a sediment and occasionally a surface scum. Milk was not coagulated. 

 The bacteria were killed by moist heat at 60° in ten minutes. The 

 authors consider their bacteria to be identical with Nakanishi's, and to 

 belong to the Actinomyces group. 



Bibliography. 



Feost, W. D. — A Laboratory Guide in Elementary Bacteriology. 



Madison, Wisconsin, 1901, viii. and 205 pp. 

 Gottheil, O. — Botanische Beschreibung einiger Bodenbakterien. 



[A series of articles dealing with earth bacteria, the method of species 

 determination, and the importance of earth bacteria in agriculture.] 



Centralbl. Bald.,, 2 te Abt., VII. (1901) pp. 430-5, 449-65, 481-97, 

 529-44, 582-91, 627-37, 6S0-91, 717-30 (4 pis.). 

 Lindner, P. — Mikroskopiscbe Betriebskontrolle in der Gahrungsgewerben. 



3rd ed., Berlin, 1901, 46S pp., 229 figs., and 4 pis. 



* Deutsche Med. Wochenschr.. 1900, No. 26. See Centralbl. Bakt., V Abt., 

 xxx. (1901) pp. 470-1. 



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