86 SUMiMARY OF CURRENT RESEARCHES RELATING TO 



He showed, among a series of corresponding results, the necessity for 

 the presence of a bacterium in the culture, and the effects of different 

 bacteria. He also followed the division of the nuclei and the formation 

 of the spore heads. 



Schizophyta. 

 Schizomycetes. 



Morphology of Human Tubercle Bacilli in Saline Media.* — 

 G. Peju and H. Rajat find that when tubercle bacilli are grown at 38°C. 

 in peptone broth, to which has been added up to 4 p.c. of KI in a 

 saturated aqueous atmosphere, and if after 15 to 18 days the growth is 

 subcultured repeatedly into fresh similar medium, the bacilli of the 

 later (5th to 6th) generations have become elongated, some forming 

 filaments 50-60 /j. long, some having lateral buddings : these buds appear 

 to elongate into filaments which also have lateral buds, a mycelial 

 appearance resulting ; but dichotomous division was never observed. 



Subcutaneous Fibro-granulomata in Cattle.f — P. G. Woolley 



describes cases of subcutaneous granulomata occurring in Chinese cows, 

 with appearances resembling actinomycosis. The tumours consisted of 

 a fibrous envelope inclosing granulomatous tissue and a central cavity 

 containing pus, from which on every occasion the author obtained, after 

 a week or more, by culture on glycerin-agar, minute fine granular grey 

 colonies of non-motile short thin rods ; these stained by the ordinary 

 dyes, but not by Gram's method ; they were not acid-fast, but when 

 stained with carbol-thionin or with 10 p.c. carbol-fuchsin they showed 

 a beaded appearance. Growth was slow, and only obtainable on glycerin- 

 agar. The organism was not pathogenic to monkeys. 



Three Iron Bacteria 4 — D. Ellis describes three thread bacteria, that 

 are covered with the red hydroxide of iron, and constitute the red deposit 

 in the streams of the neighbourhood of Glasgow. 1. Leptothriz 

 ochracea consists of a number of straight filaments often with unsym- 

 metrical ends, and having a sharply contoured membrane ; they vary in 

 width from 1 ■ 5-2 /x, though when covered with ferric oxide the width 

 may be 3/* or more, and the length attains 300/* or over. Conidia 

 arise by budding, the buds separating by constriction, though this is 

 often delayed and the buds elongate to form new threads. The conidia 

 are oval, 1 • 5 by 1 /a. Multiplication by cell-division also occurs. 

 Motility was never observed. 2. Gallionella ferruginea is usually 

 associated with the preceding, and is seldom found alone. In appear- 

 ance it resembles a hairpin spirally twisted round itself ; the thickness 

 of the threads varies from " 5-1 /*. The author was not able to dis- 

 tinguish any definite membrane. Multiplication takes place by the 

 cutting off of small portions which elongate into new individuals. 

 Conidia formation also occurs. Motility was never observed. 3. 

 Spirophyllumfernitjuieum, the body of the cell is elongated and flattened 



* C.R. Soc. Biol. Paris, lxiii. (1907) p. 427. 



t Ceutralbl. Bakt., lte Abt. Orig., xlv. (1907) p. 214. 



j Op. cit., 2te Abt., xix. (1907) p. 502. 



