tn saitiaieieulal 
BULLETIN OF THE BUSSEY INSTITUTION. 411 
ordinary Weende method of analysis, gave 74.77% of ‘‘ crude 
fibre.’* Three other samples, after having been digested in am- 
monia water for 24 hours and washed with water until the filtrate 
no longer gave an alkaline reaction, were fused with caustic potash 
according to Langet and the mixture was kept for an hour at 
180°C. There was obtained 47.14%, 44.75% and 49.95% 
respectively of ‘‘ cellulose.” In the last two instances, dilute 
sulphuric acid and alcohol were added to the filtrates from cellu- 
lose to throw down Lange’s ‘‘lignic acids” and there was obtained 
of this substance 17.14% in the one case and 13.54 in the other. 
On distilling the 13.54% sample of lignic acids with hydro- 
chloric acid for furfurol there was obtained 7% of it, equal to 
12.88% of pentosans in this lignic acid or to 1.75% of pentosans 
in the original peach stones. 
On distilling the 44.75% sample of cellulose with hydrochloric 
acid for furfurol there was obtained 24.59% of it in that cellulose, 
equal to 45.23% of pentosans in the cellulose, or to 11% of fur- 
furol and 20.24% of pentosans in the original peach stones. In 
this instance it will be noticed there was no preliminary leaching 
of the peach stones with soda lye to remove wood-gum. 
A portion of the 49.95% sample of cellulose was moistened and 
fused anew with a fresh quantity of caustic potash which was held 
at 180° for an hour, as usual, and there was recovered 93.94% of 
it as cellulose and 5.91% as lignic acids. Still another 15 grm. 
sample of the powdered peach stones, after having been digested 
with ammonia water and washed, as before, was left to soak 
during 24 hours in the cold with ten times its weight of a 5% 
solution of caustic soda. Wood-gum was precipitated from this 
solution by means of dilute hydrochloric acid and alcohol, and 
cellulose and lignic acids were determined subsequently in the 
matter insoluble in soda lye, by fusing this residue with caustic 
potash, after Lange. There was found 2.99% of wood-gum, 
20.45% of lignic acid and (somewhat remarkably) 66.72% of 
cellulose, which on being distilled with hydrochloric acid gave 
10.77% of furfurol, equal to 19.82% of pentosans. 
Yet another sample of the peach stones, after treatment with 
ammonia water, was digested for 24 hours in hot 5% soda lye, in 
* Bulletin of the Bussey Institution. 1, 375. 
+ Zeitschrift fiir physiologische Chemie. 14, 283, 328. 
