60 DROSERA ROTUNDIFOLIA. (Cuar. IV. 
(57°°2 Cent.) which was raised to 145° (62°°7 Cent.) ; neither became 
inflected. One of these, however, after having been left for 31 m. in 
cold water, exhibited some slight inflection, which increased after an 
additional interval of 1 hr. 45 m., until all the tentacles, except sixteen 
or seventeen, were more or less inflected; but the leaf was so much 
injured that it never re-expanded. The other leaf, after having been 
left for half an hour in cold water, was put into the strong solution, 
but no inflection ensued; the glands, however, were blackened, and in 
some cells there was a little aggregation, the spheres of protoplasm 
being extremely small; in other cells, especially in the exterior 
tentacles, there was much greenish-brown pulpy matter. 
Experiment 8.—A leat was plunged and waved about for a few 
rninutes in water at 140° (60° Cent.), and was then left for half an 
hour in cold water, but there was no inflection. It was now placed in 
the strong solution, and after 2 hrs. 30 m. the inner submarginal 
tentacles were well inflected, with their glands blackened, and some 
imperfect aggregation in the cells of the pedicels. Three or four of 
the glands were spotted with the white porcelain-like structure, like 
that produced by boiling water. I have seen this result in no other 
instance after an immersion of only a few minutes in water at so low a 
temperature as 140°, and in only one leaf out of four, after a similar 
immersion at a temperature of 145° Fahr. On the other hand, with 
two leaves, one placed in water at 145° (62°°7 Cent.), and the other in 
water at 140° (60° Cent.), both being left therein until the water 
cooled, the glands of both became white and porcelain-like. So that 
the Tae of the immersion is an important clement in the 
result. 
Experiment 9.—A leaf was placed in water at 140° (60° Cent.), 
which was raised to 150° (65°°5 Cent.); there was no inflection; on 
the contrary, the outer tentacles were somewhat bowed backwards. 
The glands became like porcelain, but some of them were a little 
mottled with purple. The bases of the glands were often more 
affected than their summits. ‘This leaf having been left in the strong 
solution did not undergo any inflection or aggregation. 
Experiment 10.—A leaf was plunged in water at 150° to 1503° 
(65°°5 Cent.) ; it became somewhat flaccid, with the outer tentacles 
slightly reflexed, and the inner ones a little bent inwards, but only 
towards their tips; and this latter fact shows that the movement was 
not one of true inflection, as the basal part alone normally bends. The 
tentacles were as usual rendered of a very bright red, with the glands 
almost white like porcelain, yet tinged with pink. The leaf having 
been placed in the strong solution, the cell-contents of the tentacles 
became of a muddy brown, with no trace of aggregation. 
Experiment 11.—A leaf was immersed in water at 145° (62°°7 
Cent.), which was raised to 156° (68°°8 Cent.). The tentacles became 
bright red and somewhat reflexed, with almost all the glands like 
porcelain ; those on the disc being still pinkish, those near the margin 
quite white. The leaf being placed as usual first in cold water and 
