332 
PAUL GIBIER. 
For this reason, I consider the following observation, which I 
made in the course of researches on diabetes mellitus, as suffic¬ 
iently interesting to lay it before the Academy. 
Experiment .—A female dog, aged about 4 years, was placed 
under observation while at liberty with the other dogs utilized 
in the laboratory of the Institute. Its urine, tested repeatedly 
for sugar, for several successive days, gave no reaction with the 
cupro-potassic, or Fehling’s fluid, and when decolorized and ex¬ 
amined, with the polariscope there was no deviation of light. 
When this dog, which is of an affectionate, timid and jealous 
nature, is placed in its cage alone, it whines continually, and 
when it sees the other dogs enjoying liberty, its cries become 
unbearable. 
When the dog was shut up on the first occasion its urine 
gave no reaction for three days, but on the evening of the fourth 
day, it contained 5.55 per 1.000 of Glucose as demonstrated by 
Fehling’s fluid and the polariscope. The Glycosuria persisted 
as long as the captivity, but, on the day after the dog was set 
free, the sugar disappeared. 
The same experiment was repeated six times on this dog 
with the same results, viz., that, after four, three and even two 
days of incarceration, glycosuria appeared, while it disappeared 
(after one, two or three days) when the prisoner was allowed to 
enjoy liberty and the company of the other dogs. The quantity 
of glucose was 6.66 in one of the experiments, 8.88 in another, 
and in a third it was 25 per thousand, a very high ratio compared 
with that observed generally in animals affected with diabetes. 
Glycosuria did not occur when the animal was shut in with a 
companion. No comparison was made with regard to the quan¬ 
tity of urine, drink and food. 
The experiment tried with another female dog of seemingly 
apathetic nature, gave negative results. 
This fact demonstrates that some animals, like man, are sus¬ 
ceptible of being affected with glycosuria under the influence of 
physical excitation. To my mind the deduction which may be 
drawn from this fact is that the experimenters who attempt to 
