THE RESPIRATION OF ROOTS. 219 
— who makes a successful study of the growth of Bacillus 
An 
in e 
similar to B. subtilis. He finds that in the bodies of certain animals 
the Bacillus multiplies with ribet ts. acral the cells elongating 
and becoming transverely part: 5 ria aon and rabbits 
were inoculated with fresh Pacillus. peer filnid ; but it was found 
that the inoculated animals behaved differently, the p 
most successful with guinea-pigs, less so with rabbits, and still less 
mice, while inoculation was fruitless in the case ogs, t 
hounds, a pa g a sp he has also ascertained 
that, under proper conditions ‘of tempe rature and access of air, the 
Bacillus flourishes in the blood of dead animals or in other fit nourish- 
ing fluids. After a culture in a nourishi had been exposed 
for 15-20 hours to a temperature of 385-37° i dle 
f the preparation only short cells were one 
those in ‘the centre. In many of these elongated ¢ aie spores very 
similar to those of B. subtilis were developed; after formation of these 
the individual cells become invisible, as we have already seen to have 
ae’ dh ae with B. subtilis. Culture-fluids in which were sown 
tionally formed; and below 12° C. growth is completely arrested ; on oi the 
other hand, development is feeble at 45° C., and it appears to cease at 
50° C. The sources of splenic fever would seem to be infected car- 
cases buried not deeply enough, affected animals lying in fields, stalls 
i ’ 1 i i ist ground. 
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disinfection and i io io a of healthy animals. Two additional pieces 
of information ar iving viz., that in the sea district of Manns- 
feld, in Prussia, t the easly loss of sheep from splenic fever is repre- 
sented by 180,000 ark f Novgorod alone, 
in the period 1867-7 70, no less than 56, 000 horses, cows and sheep, and 
528 men, fell victims to this exacting pestilence. 8. iM. 
Tur Hiersaarioe or Roots. 
— sur - la respiration des ri Par MM. P. P. Denenarn et 
J. Vusq (Ann. des Sciences Nae vi série, tome iii, p. 327. 
