400 BULLETIN OF THE BUSSEY INSTITUTION. 
furfurol amounting to 5.97% of the original dry bark, 7. e., 10.98% of 
pentosans. 
From the residue after the action of hydrochloric acid of about 2.5% 
on the outer wood of the Gray Birch tree felled in July, there was ob- 
tained furfurol amounting to 8.63% of the dry wood, 7. e., 15.87% of 
pentosans. 
From the residue after the action of hydrochloric acid of about 2.5% 
on the inner wood of the Gray Birch trec felled in July, there was ob- 
tained 7.96% of furfurol, 7. e., 14.64% of pentosans, calculated on the 
original dry wood. 
One residue left after the action of hydrochloric acid of about 2.5% 
on the outer wood of a Gray Birch felled in October, on being boiled 
for one hour with hydrochloric acid of 1% gave 0.88% of pentosans and 
the residue from the action of this 1% acid gave 4.63% of furfurol, 7. e., 
8.53%, pentosans, all calculated on the original wood. Another similar 
residue from the action of acid of about 2.5% on being boiled with acid 
of 1% gave 0.83% of pentosans and the residue from this action gave, in 
its turn, 4.23% of furfurol, 7. e., 7.78% of pentosans. 
From the residue left after the action of hydrochloric acid of about 
2.5% on the outer wood of a Sugar Maple felled in October, there was 
obtained furfurol amounting to 4.86% of the residue, Z. e., to 8.94% of 
pentosans ; while the residue from the inner maple wood yielded 6.44%, 
of furfurol. or 11.85% of pentosans. 
From the residue left after the action of hydrochloric acid of about 
2.5% on Date Stones there was obtained furfurol amounting to 4.30% of 
the original dry stones, 7. €., to 7.91% of pentosans. In the experiment. 
(page 396) where the stones themselves were distilled for furfurol 
9.64% of pentosans were obtained. 
From the residue left after the action of hydrochloric acid of about. 
2.5% on Apricot Stones there was obtained furfurol amounting to 6.95% 
of the original dry stones, 7. e., to 12.78% of pentosans. 
From the residue left after the action of hydrochloric acid of about 
2.5% on Peach Stones there was obtained furfurol amounting to 7.609%, 
of the dry stones, 7. e., to 13.98% of pentosans. 
Pentosans in the Residues left after action of Hydrochloric Acid 
of 1%. 
From the residue left after the action of hydrochlorie acid of 1% on 
the outer wood of the Gray Birch tree felled in October there was 
obtained furfurol amounting to 12.88% of the original dry wood, 7. e., 
to 23.70% of pentosans. 
From the residue left after the action of hydrochloric acid of 1% on 
Peach Stones there was obtained furfurol amounting to 8.73% of the 
original dry stones, 7. e., to 16.06%, of pentosans. 
ee 
