82 DROSERA ROTUNDIFOLIA. Cuar. V. 
nitrogenous matter by the glands of the tentacles 
on the disc. 
Some of the leaves which were not affected by the 
non-nitrogenous fiuids were, as above stated, imme- 
diately afterwards tested with bits of meat, and were 
thus proved to be in un active condition. But in 
addition to these trials, twenty-three of the leaves, 
with drops of gum, syrup, or starch, still lying on 
their dises, which had produced no effect in the course 
of between 24 hrs. and 48 hrs., were then tested with 
drops of milk, urine, or albumen. Of the twenty-three 
leaves thus treated, seventeen had their tentacles, and 
in some cases their blades, well inflected; but their 
powers were somewhat impaired, for the rate of move- 
ment was decidedly slower than when fresh leaves 
were treated with these same nitrogenous fluids. This 
impairment, as well as the insensibility of six of the 
leaves, may be attributed to injury from exosmose, 
caused by the density of the fluids placed on their 
dises. 
The results of a few other experiments with nitrogenous fluids 
may be here conveniently given. Decoctions of some vegetables, 
known to be rich in nitrogen, were made, and these acted like 
animal fluids. Thus, a few green peas were boiled for some time 
in distilled water, and the moderately thick decoction thus made 
was allowed to settle. Drops of the superincumbent fluid were 
placed on four leaves, and when these were looked at after 
16 hrs., the tentacles and blades of all were found strongly 
inflected. I infer from a remark by Gerhardt* that legumin is 
present in peas “in combination with an alkali, forming an 
incoagulable solution,” and this would mingle with boiling 
water. I may mention, in relation to the above and following 
experiments, that according to Schifft certain forms of albumen 
* Watts’ ‘Dict. of Chemistry,’ Digestion, tom. i. p. 379; tom 
vol. iii. p. 568. ik, pp. 154, 166, on legumin. 
t ‘Lecons sur la Phys. de la 
