304 DIONZA MUSCIPULA. Cuar. XJIL 
é 
opposite end with the albumen; bat no further observations 
were made. 
periment 18.—A globule of chemically prepared casein, 
about 2; of an inch in diameter, was placed on a leaf, which 
spontaneously opened after eight days. The casein now con- 
sisted of a soft sticky mass, very little, if at all, reduced in size, 
but bathed in acid secretion. 
These experiments are sufficient to show that the 
secretion from the glands of Dionza dissolves albu- 
men, gelatine, and meat, if too large pieces are 
not given. Globules of fat and fibro-elastic tissue 
are not digested. The secretion, with its dissolved 
matter, if not in excess, is subsequently absorbed. On 
the other hand, although chemically prepared casein 
and cheese (as in the case of Drosera) excite much 
acid secretion, owing, I presume, to the absorption of 
some included albuminous matter, these substances 
are not digested, and are not appreciably, if at all, 
reduced in bulk. 
Liffects of the Vapours of Chloroform, Sulphuric Ether, and Hydro- 
cyanic Acid.—A plant bearing one leaf was introduced into a 
large bottle with a drachm (8°549 ml.) of chloroform, the mouth 
being imperfectly closed with cotton-wool. The vapour caused 
in 1 m. the lobes to begin moving at an imperceptibly slow rate; 
but in 3 m. the spikes crossed, and the leaf was soon com- 
pletely shut. The dose, however, was much too large, for in 
between 2 and 3 hrs. the leaf appeared as if burnt, and soon 
died. 
Two leaves were exposed for 80 m. in a 2-oz. vessel to the 
vapour of 30 minims (1°774 ml.) of sulphuric ether. One leaf 
closed after a time, as did the other whilst being removed from 
the vessel without being touched. Both leaves were greatly 
injured. Another leaf, exposed for 20 m. to 15 minims of ether, 
closed its lobes to a certain extent, and the sensitive filaments 
were now quite insensible. After 24 hrs. this leaf recovered 
its sensibility, but was still rather torpid. A leaf exposed 
in a large bottle for only 3 m. to ten drops was rendered 
insensible. After 52 m. it recovered its sensibility, and when 
one of the filaments was touched, the lobes closed. It began 
