I 3 6 BACTERIOLOGY. 



and differ very little from Bacterium termo* They 

 produce a yellow colour in boiled milk, which at 

 first becomes acid, and then strongly alkaline. 

 They also occur on boiled potatoes, carrots, etc., 

 where they form small lemon-yellow masses. The 

 colouring matter soluble in water, insoluble in ether 

 and alcohol, unchanged by alkalies, decolorised by 

 acids. It is similar to yellow aniline colours both 

 spectroscopically and in ordinary reactions. 



Bacterium of Diphtheria in Man and 

 Pigeons. Elongated cocci, or short, stout rods, 

 mostly twice as long as broad. Inoculation with 

 cultivations from a human source on nutrient gela- 

 tine and potatoes produced the disease in pigeons, 

 mice, and rabbits. A bacillus has also been 

 isolated from diphtheritic membranes ; vide also 

 Streptococcus diphtheriticus (p. ^17). 



Panhistophyton ovatum, Lebert (Nosema 

 bombycis, Micrococcus ovatus. Corpuscles du ver a 

 sou). Shining oval cocci, 2 3 /x, long, 2 /x, wide, 

 singly and in pairs, or masses ;| or rods, 2*5 JJL thick 

 and twice as long.J They multiply by sub- 

 division. They were experimentally proved to be 

 the cause of pe'brine, gattine, maladie des corpuscles, or 

 flecksucht ; and were discovered in the organs of 

 diseased silkworms, as well as in the pupae, moths, 

 and eggs. 



* Fliigge, Fermente und Mikro Paraszten. 1883. 



t Ibid. 



\ Zopf, Die Spaltpilze. 



