Cuar. XV. THEIR POWER OF ABSORPTION. 283 
same result, excepting that the hairs became throughout their whole 
length of a brownish colour. In a third leaf, which was exposed for 
1 hr. 50 m., there was much aggregated matter in the glands; and 
some of the masses showed signs of breaking up into brown granular 
matter. This leaf was again placed in the vapour, so that it was 
exposed altogether for 5 hrs. 80 m.; and now, though I examined 
a large number of glands, aggregated masses were found in only two 
or three; in all the others, the masses, which before had been globular, 
were converted into brown, opaque, granular matter. We thus see 
that exposure to the vapour for a considerable time produces the same 
effects as long immersion in a strong solution. In both cases there 
could hardly be a doubt that the salt had been absorbed chiefly or 
exclusively by the glands. 
On another occasion bits of damp fibrin, drops of a weak infusion of 
raw meat and of water, were left fur 24 hrs. on some leaves ; the hairs 
were then examined, but to my surprise differed in no respect from 
others which had not been touched by these fluids. Most of the cells, 
however, included hyaline, motionless little spheres, which did not 
seem to consist of protoplasm, but, 1 suppose, of some balsam or 
essential oil. 
Pelargonium zonale (var. edged with white),—The leaves are clothed 
with numerous multicellular hairs; some simply pointed; others 
bearing glandular heads, and differing much in length. The glands 
on a piece of leaf were examined and found to contain only a limpid 
fluid; most of the water was removed from beneath the covering glass, 
and a minute drop of one part of carbonate of ammonia to 146 of water 
was added; so that an extremely small cose was given. After an 
interval of only 3 m. there were signs of aggregation within the glands 
of the shorter hairs; and after 5 m. many small globules of a pale 
brown tint appeared in all of them; similar giobules, but larger, being 
found in the large glands of the longer hairs. After the specimen had 
been left for 1 hr. in the solution, many of the smaller globules had 
changed their positions; and two or three vacuoles or small spheres 
(for 1 know not which they were) of a rather darker tint appeared 
within some of the larger globules. Little globules could now be seen 
in some of the uppermost cells of the pedicels, and the protoplasmic 
lining was slightly separated from the walls of the lower cells. After 
2 hrs. 30 m. from the time of first immersion, the large globules 
within the glands of the longer hairs were converted into masses of 
darker brown granular matter. Hence from what we have seen with 
Primula sinensis, there can be little doubt that these masses originally 
consisted of living protoplasm, 
A drop of a weak infusion of raw meat was placed on a leaf, and 
after 2 hrs, 30 m. many spheres could be seen within the glands. 
These spheres, when looked at again after 30 m., had slightly changed 
their positions and forms, and one had separated into two; but the 
changes were not quite like those which the protoplasm of Drosera 
undergves. These hairs, moreover, had not been examined before 
