COM PTE RENDU OF THE 
:)88 
and among the latter wool, which turns brown more or less quickly. 
The association of these two substances having to take place in 
the fabrication of several tissues, application of this solution will 
permit us to distinguish them simply by wetting the tissue, and 
then leaving it to dry in the air. 
A fact communicated to the Academy of Science in the first 
month of the year would lead us, in some measure, to believe the 
action of arsenious acid on cattle. MM. Renault and Lassaigne 
hastened, without loss of time, to test a fact which seemed so im- 
probable. They discovered that a moderate dose of this drug was 
as poisonous to cattle as it is to the carnivorous species, especially 
when given under circumstances favourable to its absorption. 
The experiments made in this College on sheep that have been 
destroyed by this poison have shewn the course of the arsenious 
acid in the blood, the liver, the lungs, and its expulsion by urine ; 
the same as it has been observed in other species. 
The Artesian wells which have been dug during the last year, 
on several of the neighbouring farms and estates, have afforded to 
M. Lassaigne the opportunity of analyzing the water obtained 
from them. These observations, by shewing that the temperature 
of these waters was equal to the depth of the layers of earth 
which contain them, have enabled us to state that, in point of com- 
position, they were similar to the water of common wells contain- 
ing the same calcareous and magnesian salts. 
Chair of Anatomy and Physiology. 
Professor M. Rigot. 
Assistant Professor M. Goubause. 
The museum has this year become enriched by the addition of 
a great number of interesting pathological preparations bearing 
upon the study of anatom}'. Some of these have been obtained 
from animals admitted into the hospital, and which have died 
there ; and others, and not less curious ones, have been sent to 
the College by different veterinary surgeons. 
Among these, we mention particularly two osteosarcums of the 
upper jaw of a cow ; and the oesophagus of a horse, presenting 
from the base of the heart to the level of the diaphragm a dilatation 
resembling the crop of a bird, and filled with alimentary substances. 
The fleshy membrane of this passage, which alone had been torn, 
consisted^ only of a kind of band about eight centimetres in width, 
and similar in appearance to the longitudinal bands of the great 
intestine. The mucous membrane, which constituted the greater 
