CARBONATE OF AMMONIA ON CHLOROPHYLL-BODIES. 269 
nular deposit of a pale brownish colour, and that this tends to 
aggregate into balls ; that afterwards the grains of chlorophyll are 
acted on, some swelling up and becoming completely confluent, 
so that no trace of their original structure is left, and others 
breaking up into extremely fine greenish granular matter, which 
appears likewise to undergo aggregation. The final result is the 
formation of balls of brown, and sometimes reddish, granular 
matter, often surrounded by zones, more or less thick, of yellowish 
or greenish, or almost colourless transparent matter. Or, again, 
spheres, ovals, and oddly-shaped masses are formed, consisting 
exclusively of this transparent yellowish-green matter. As soon 
as the process of aggregation has been thoroughly carried out, 
not a grain of chlorophyll can be seen. 
Drosera rotundifolia.—It is advisable to select for observation 
pale reddish leaves, as the dark-red ones are too opaque; and 
the process of aggregation does not go on well in the small 
completely green leaves which may sometimes be found. The 
tentacles, which are merely delicate prolongations of the leaf, 
are from their transparency well fitted for observation. In 
sections of the disks of fresh leaves, the cells of the epidermis 
are seen to abound with grains of chlorophyll, as well as those of 
the underlying parenchyma. The bases of the exterior tentacles 
and the part immediately beneath the glands are generally 
coloured pale green from the presence of chlorophyll-grains in 
the parenchyma; and some occur throughout the whole length 
of the longer tentacles, but are not easily seen on account of the 
purple cell-sap. Sometimes the epidermal cells of the longer 
tentacles include chlorophyll-grains; but this is rather a rare 
event. The footstalks of the short tentacles on the disk are 
bright green, and invariably abound with grains of chlorophyll. 
A pale leaf, in which the basal cells of the exterior tentacles 
contained numerous grains of chlorophyll, was left for 24 hours 
in a solution of only 2 parts of the carbonate to 1000 of water ; 
and now innumerable greenish spheres, resembling oil in appear- 
ance, were present in these cells, and the ordinary chloropbyll- 
grains had in most places disappeared. Nevertheless in several 
cells some swollen grains were still distinct. Other cells con- 
tained fine granular or pulpy green matter collected into masses 
at one end. In a few other cells the chlorophyll-grains had run 
together, forming a continuous green rim with a sinuous outline 
attached to the walls. In fresh leaves the guard-cells of the 
