364 
M. L. TRASBOT. 
From his remarkable labors some were communicated to the 
Academy of Medicine in 1865, 1866 and 1868, others in the 
Annales of Dermatology in 1871, and in the Journal of the 
School of Lyons in 1877. This last, Contribution to the Study 
of the Original Vaccine, Comparative Remarks upon the Vaccin- 
ogenous Aptitute in the Principal Vacciniferous Species,* is, 
properly speaking, the relation of all the forms of inoculation 
tried by the author; and is the resume of the results he has 
obtained with each mode, not only in the horse but upon the ox. 
They are all so well known that to mention them is to remind all 
of the results obtained. As, however, many of the facts carried 
with them a real instruction, it may not be useless to cite them 
briefly. 
In a first paragraph, after some consideration upon the natural 
form of the eruption and its ordinary site, M. Cliauveau gives 
the negative results obtained by transfusion of the blood. This 
liquid, taken from affected animals in the period d'etat, and in¬ 
jected in the veins of two healthy animals, did not contaminate 
them. A month later sub-epidermic inoculation on these animals 
proved successful. This is undoubtedly one of the most demons¬ 
trative experiments. For, though negative facts have not an 
absolute value, when two cases like those are reproduced alike in 
different experiments, they furnish the elements of a scientific 
certitude as completely as possible. It must then be admitted 
that at the period d’etat of the disease the blood is not virulent. 
Perhaps it would not be so, if one would experiment with the 
blood at the period of eruption, at the time when this will begin ? 
To this day, no one to my knowledge has yet realized this 
experiment, and it is doubtful if it will ever be, on account of 
the difficulties it presents. There is consequently one point to 
reserve on this question. 
Still it is true that the transfusion of the blood would always 
be an unsatisfactory and bad means to communicate the disease 
to a healthy subject. M. Cliauveau has proved, however, that 
in virulent affections, others than those which are septic, of 
*Contribution A l’Etude de la Vaccine Originelle, Reclierclies Comparatives 
sur 1’Aptitude Vacciuogene dans la Principales Especes Vaccini feres. 
