178 DROSERA ROTUNDIFOLIA. Cuap. VIIL 
of four leaves. Two, apparently, were not at all affected in 
48 hrs.; the third had its tentacles slightly inflected; whilst 
the fourth had almost all its tentacles inflected in 24 hrs., and 
these did not begin to re-expand until the fourth day, and were 
not perfectly expanded on the seventh day. I presume that 
this leaf was injured by the salt. Half-minims of a weaker 
solution, of one part to 487 of water, were then dropped on the 
discs of six leaves, so that each received 53, of a grain. In 
Lhr. 83 m. there was slight inflection; and after 5 hrs. 30 m. 
the tentacles of all six leaves were considerably, but not closely, 
inflected. After 23 hrs. 15 m. all had completely re-expanded, 
and did not appear in the least injured. 
Three leaves were immersed, each in thirty minims of a solu- 
tion of one part to 875 of water, so that each received ¥, of a 
grain, or 2°02 mg. After 1 hr. there was much inflection; 
after 8 hrs. 80 m. all the tentacles and the blades of all three 
were closely inflected. Four other leaves were also immersed 
in the solution, each receiving the same amount of salt 
as before, viz. 3, of a grain. They all soon became inflected ; 
after 48 hrs. they began to re-expand, and appeared quite un- 
injured, though the solution was sufficiently strong to taste 
saline. : 
Sodium, Iodide of.—Half-minims of a solution of one part to 
487 of water were placed on the discs of six leaves. After 
24 hrs. four of them had their blades and many tentacles in- 
flected. he other two had only their submarginal tentacles 
inflected; the outer ones in most of the leaves being but little 
affected. After 46 hrs. the leaves had nearly re-expanded. 
Three leaves were also immersed, each in thirty minims of a 
solution of one part to 875 of water. After 6 hrs. 30 m. almost 
all the tentacles, and the blade of one leaf, were closely inflected. 
Sodium, Bromide of.—Half-minims of a solution of one part to 
487 of water were placed on six leaves. After 7 hrs. there was 
some inflection; after 22 hrs. three of the leaves had their blades 
and most of their tentacles inflected ; the fourth leaf was very 
slightly, and the fifth and sixth hardly at all, affected. Three 
leaves were also immersed, each in thirty minims of a solution 
of one part to 875 of water; after 40 m. there was some inflec- 
tion; after 4 hrs. the tentacles of all three leaves and the blades 
of two were inflected. These leaves were then plated in water, 
and after 17 hrs. 80 m. two of them were almost completely, 
and the third partially, re-expanded; so that apparently they 
were not injured, 
