ANALYSIS OF CONTINENTAL JOURNALS. 
538 
author, without further hesitation, seized it with the pincers 
used to remove the milk teeth, and, by a movement from 
side to side, it was easily extracted. The wound was closed 
with sutures, and in twelve to fifteen days the cicatrisation 
was perfect. 
This tooth the author has shown in 1851 to M. Thiernesse, 
at the time Professor of Anatomy, now Director of the Vete¬ 
rinary School of the State, and given to be deposited in the 
anatomical museum. It is of the size of a pigeon's egg, 
and as w’ell formed as an ordinary molar tooth; the fangs 
being tricuspid, brings its resemblance closer to the last 
maxillary teeth. 
From these details it will be perceived that the corona- 
dentis were not turned to^vards the cranium, as in the case 
of M. Macorps. 
THE PART PLAYED BY MICROZOA AND MICROPHYTES IN 
THE DEVELOPMENT AND PROPAGATION OF DISEASE. 
By Doctor F. De Ranse. 
This is a very important essay, but too long to give in 
extenso; we cannot pass it, however, without giving a few 
extracts. 
That which seems to have lately occupied the mind of inves¬ 
tigators is the examination of the germs of the organism of 
ferments, and their mode of evolution. Until the present time 
the pauspermists, who, it must be admitted, are in the majo¬ 
rity, have advocated the view of the dissemination of thegerms 
in the places where animals and plants find their existence, but 
this notion was rather a logical deduction of their principle than 
the result of a direct and positive demonstration. Microzoa 
and microphytes had in fact been found in fermented matter, 
but their larvae and germs had not been isolated, and the evolu¬ 
tion, or transformation of the latter, had not been followed. 
M. Lemaire was one of the first to fill up this gap in a work 
communicated to the Academy of Science, in which he has 
shown that in the watery vapour of the confined air in 
barracks and casemates condensed by cold, were contained 
small spherical bodies of an ovoid cylindrical shape, the 
number of which diminishes in proportion to the development 
of the number of infusorii, and that, consequently, they would 
be considered as the germs of these infusorii. Experiment 
