ROYAL AND CENTRAL SOCIETY OF AGRICULTURE. 413 
does not appear to be a sufficient time to authorize the conclusion 
that they had not been infected. M. Jacob is too talented a man 
not to acknowledge the justice of this remark. It is only neces- 
sary to fill up the hiatus that we have pointed out in order to 
make his experiments exceedingly valuable. 
Communications from Gentlemen who do not belong to the Society . 
Collections of Observations. 
M. Canu, veterinary surgeon at Thorigny (Manche), who has 
already received a silver medal from the society, addresses a col- 
lection of six cases of veterinary practical surgery to you. The 
four first relate to a peculiar species of displacement of the uterus 
observed in the cow during gestation. In each of these cases, that 
portion of the womb which ought to have been connected with 
the left flank was found in connexion with the right flank. This 
displacement had given a tortuous direction to the neck of the 
uterus, which frustrated all attempts to effect parturition. The 
cows died, because it was impossible to remove the foetus from 
them. 
In the fifth case, M. Canu, after having pointed out the various 
accidents to which cattle are exposed when an apple or potatoe, 
from being swallowed too greedily, becomes impacted in the oeso- 
phagus, and after describing all the known means to which far- 
mers and country people have recourse on such occasions, and 
the fatal results which too often succeed the application of these 
means, relates a case of rupture of the oesophagus which healed 
spontaneously. 
The last case contains a fresh example of the possibility of ef- 
fecting a cure when the metacarpal bone of the horse has become 
fractured. 
M. Lecoq, veterinary surgeon at Bayeux (Calvados), perpetual 
secretary to the Veterinary Society of the department of Calvados 
and La Manche, and on whom the Society has already bestowed 
certain well-deserved honours at the meetings in 1831-33-35-38, 
and 1840, has this year sent a collection of twelve cases, most of 
which are of an interesting nature. 
The two first relate to metritis, complicated with gangrene of 
the mucous membrane of the utero-vaginal canal in a cow. The 
third had relation to the poisoning of a cow by hemlock ( conium 
rnaculatnm). This animal, to whom hemlock had been given, 
intermingled with grass, exhibited all the symptoms of having- 
been poisoned when M. Lecoq was called in. A bleeding of six 
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