ANALYSIS OF CONTINENTAL JOURNALS. 
535 
success obtained during a long practice by the incision of 
the crop in cases of poisoning in fowls, and the evacuation of 
the aliments contained in this reservoir, and moreover, the 
little danger of this operation, I at once had recourse to it. 
After having extracted the substances out of this organ, and 
washed the mucous membrane with some warm milk, the 
incision was closed with a few sutures ; of four birds ope¬ 
rated on, only one recovered. The crop of these four birds 
was filled with barley, mixed with some of the larvae of insects, 
small stones and fragments of broken glass. 
The post-mortem examination was made with scrupulous 
care, and is minutely described, but nothing led to a correct 
diagnosis of the cause of death, and it was only after ana¬ 
lysing the contents of the crop that all doubts as to the 
nature of the poison were removed. Marshes apparatus 
clearly indicated the presence of lead and arsenic in the 
ingesta. 
OBSERVATIONS ON DENTAL CYSTS AND THE ANORMAL 
PRODUCTION OE TEETH IN THE HORSE. 
By E. Dexenboueg, Ex-goverument Veterinary Surgeon. 
The author says that in the course of twenty-five years he 
has only met with six cases of dental cysts, five of them had 
been successfully operated on, and it W’as only the sixth that 
enlightened him on their nature; he frankly confesses having 
considered them as mucous tumours accidentally formed 
from unknown causes, when in the last year (1851) he found 
a molar tooth perfectly well formed, from which he was con¬ 
vinced that they all had the same origin. 
This last observation was embodied in a report to the 
Government upon the extraction of a molar tooth from the 
ear of a horse, without, however, the originality of the case 
having attracted any particular notice. 
The first case of this nature observed by the author was 
in 1837 in a three-year old filly, which had on each side of 
the head (temporal region) a fistula, from which oozed a 
visco-mucus, transparent fluid, of a dirty white colour, 
without any unpleasant odour, this discharge running down 
the cheeks, dirtying, and agglutinating the hairs, accumu¬ 
lating on the face, and by the action of the hair acquiring a 
fetid odour. On probing the bottom of these fistulas nothing 
})articular was detected, but the probe was followed with a 
greater discharge of mucus. No doubt these fistulas were the 
