GLUCOSE IN THE ANIMAL ORGANISM. 
451 
glucogenia. Now, the radical objections which had been 
raised against this doctrine from its first promulgation the 
most robust faith could hardly stand up against: we there- 
fore thought it necessary to resume the question ab ovo, ex- 
amining it under all the various phases which the subject 
might suggest to us. We sought glucose not only in the 
liver, but also in all the other organs of vertebrate animals. 
Glucose in Fishes . — Of forty sea and fresh- water fish, some 
presented sugar in the liver to the amount of from 0*484 gr. 
to 1*50 gr. per cent. ; but the intestines, spleens, soft roes, 
ovaries and muscular flesh contained none. In the others, 
there was no sugar in any part. 
Glucose in Frogs. — The livers of these reptiles gave 0-315 
gr. to 0*632 gr. of sugar ; the viscera and muscular flesh 0. 
Ghtcose in Birds . — The same results as for fishes ; no 
sugar in the viscera; the liver gave from 0 to 2T64 gr. per 
cent. 
Glucose in Mammalia. — A liver of a hare 0 ; of a roe-buck, 
1*092 gr. ; of three rabbits, from 1 grain to T 1 63 gr. ; of 
three cats, 0*807 to 2*305 gr. ; of two dormice, in the state 
of hibernation, 0*624 gr. ; absence of sugar in the other 
viscera and muscular flesh. 
Most of these animals, as well as those of the preceding 
classes, were in undetermined physiological conditions. 
The sugar being destroyed, as we proved, both in organic 
decoctions and in the tissues themselves, as the livers of 
animals soon after death have always given us glucose, we 
have felt warranted in thinking that when a liver does not 
yield sugar, this principle has been transformed by time. 
Ts the glucose which is formed in the organism introduced 
into it ready formed by the muscular flesh ; or, in the case of 
the herbivora, does it result from the transformation into 
sugar of a portion of the anhydrous alimentary substances in 
the intestinal tube ? May we extend to other organs than 
the liver, and in particular to the internal parietes, the 
faculty of producing sugar ? Before describing the various 
experiments which we have made relative to these different 
points, we may mention that we have often found sugar in 
the muscular flesh of the horse, with which our dogs were 
fed, and also in the mutton, veal, beef, and pork used for the 
food of man, but in a very minute quantity ; a few milli- 
grammes in 100 grammes of flesh. 
A. A dog which had fasted sixty hours ; weight 33 kilo- 
grammes ; fed for six weeks with horse-flesh ; he consumed 
daily three or four kilogrammes of raw flesh. Liver 1*487 of 
glucose; lymph extracted from the thoracic canal, 0*141 ; 
