290 NON-NITROGENOUS NEUTRAL BODIES. 



and this secretion was discharged in great abundance, I cannot 

 venture to conclude from this isolated instance that sugar ever 

 exists in the saliva of non-diabetic persons, since in this case it is 

 possible that the sugar might in some way have accidentally got into 

 the vessel containing the saliva. So many heterogeneous substances 

 find their way into the saliva, as we shall subsequently see, that there 

 is nothing extravagant in the assumption that sugar may some- 

 times occur in morbid saliva. Wright places a sweet saliva 

 amongst his numerous varieties ; unfortunately, however, he did 

 not proceed to ascertain whether the sweetness of this saliva was 

 dependent on the presence of sugar, or whether it was a mere 

 subjective sensation of the patient. 



F. L. Winkler* found 8 grains of sugar in two softly-boiled 

 eggs, which had been sat upon for some time, and whose white 

 had a singularly sweet taste. I have recently convinced myself 

 that small quantities of sugar are constantly present both in the 

 yolk and in the white of fresh eggs. 



I may remark that I experimented upon 30 eggs, in order to 

 obtain evidence of the existence of small quantities of sugar. I have 

 repeatedly, and with much care, repeated Winkler's experiment, 

 in which he found so large a quantity of sugar (milk-sugar) in 

 incubated eggs, but I cannot confirm his statement. I examined 

 eggs that had been sat upon for 3, 7? and 15 days. 



Bernard and Barreswilf have found sugar in the tissue of the 

 liver even of animals that do not subsist on saccharine or amyla- 

 ceous food. 



[Experiments conducted in the G lessen laboratory have con- 

 firmed this statement, both in reference to the livers of graminivorous 

 and carnivorous animals. See Liebig and Kopp's Annual Report, 

 c., for 1847-8, Vol. 2, p. 175, note 6. G. E. D.] 



At present I can only confirm this statement with reference to 

 the liver of the frog; the extract obtained by cold alcohol from 

 from frogs' livers was treated with double its volume of ether, in 

 order to remove a portion of the biliary matters; the fluid decanted 

 from the separated taurocholate of soda was treated with an alco- 

 holic solution of potash. The great turbidity which was first 

 induced was shortly replaced by a considerable precipitate of a re- 

 sinous appearance, (the glucose and potash compound) which was 

 dissolved in water and treated with a little potash and sulphate of 

 copper, due attention being paid to the precautions we have already 



* Buchn. Repert. Bd. 42, S. 46. 

 t Comp. rend. T. 27, p. 514. 



