840 DROSOPHYLLUM LUSITANICUM. Cuar. XV. 
completely liquefied, but with a few white streaks 
still visible; the other was much rounded, but not 
yuite dissolved. Two other cubes were left on tall 
glands for 2 hrs. 45 m., by which time all the secre- 
tion was absorbed; but they were not perceptibly 
acted on, though no doubt some slight amount of 
animal matter had been absorbed from them. They 
were then placed on the small sessile glands, which 
being thus stimulated secreted copiously in the 
course of 7 hrs. One of these cubes was much 
liquefied within this short time; and both were com- 
pletely liquefied after 21 hrs. 15 m.; the little liquid 
masses, however, still showing some white streaks. 
These streaks disappeared after an additional period 
of 6 hrs. 80 m.; and by next morning (ie. 48 hrs. 
from the time when the cubes were first placed on 
the glands) the liquefied matter was wholly absorbed. 
A cube of albumen was left on another tall gland, 
which first absorbed the secretion and after 24 hrs. 
poured forth a fresh supply. This cube, now sur- 
rounded by secretion, was left on the gland for an 
additional 24 hrs., but was very little, if at all, acted 
on. We may, therefore, conclude, either that the 
secretion from the tall glands has little power of diges- 
tion, though strongly acid, or that the amount poured 
forth from a single gland is insufficient to dissolve a 
particle of aloumen which within the same time would 
have been dissolved by the secretion from several of the 
small sessile glands. Owing to the death of my last 
plant, I was unable to ascertain which of these alter- 
natives is the true one. 
Four minute shreds of pure fibrin were placed, 
each resting on one, two, or three of the taller glands. 
In the course of 2 hrs. 30 m. the secretion was all 
absorbed, and the shreds were left almost dry. They 
