566 
Proceedings of the Royal Society of Edinburgh. [Sess. 
Intracerebral inoculations generally produce a more acute and more 
fatal infection than that immediately to be described (see chart 14), while 
intracerebral passages result in a very marked exaltation in the virulence 
of M. melitensis for the monkey. 
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other Forms of Infection . — Unlike the rodents, carnivora, and ungu- 
lates previously referred to, in which the temperature commences to rise 
within a few hours of inoculation, the monkey, like man, exhibits an 
incubation period of from three to ten or even twenty days from the time 
of infection, during which interval the animal appears perfectly well and 
