Cuap. VIII, SALTS OF SODIUM. 177 
and in 45 hrs. the leaves were fully expanded, appearing quite 
healthy. : 
Three leaves were immersed, each in thirty minims of a solu- 
tion of one part of the sulphate to 875 of water; after 1 hr. 
30 m. there was some inflection, which increased so much that 
in 8 hrs. 10 m. all the tentacles and the blades of all three leaves 
were closely inflected. 
Sodium, Phosphate of.—Half-minims of a solution of one part 
to 437 of water were placed on the discs of six leaves. ‘The 
solution acted with extraordinary rapidity, for in 8 m. the outer 
tentacles on several of the leaves were much incurved. After 
6 hrs. the tentacles of all six leaves, and the blades of two, were 
closely inflected. This state of things continued for 24 hrs., 
excepting that the blade of a third leaf became incurved. After 
48 hrs. all the leaves re-expanded. It is clear that 54,5 of a 
grain of phosphate of soda has great. power in causing in- 
flection. 
Sodium, Citrate of —Half-minims of a solution of one part to 
437 of water were placed on the discs of six leaves, but these 
were not observed until 22 hrs. had elapsed. The sub- 
marginal tentacles of five of them, and the blades of four, were 
then found inflected; but the outer rows of tentacles were not 
affected. One leaf, which appeared older than the others, was 
very little affected in any way. After 46 hrs. four of the leaves 
were almost re-expanded, including their blades. Three leaves 
were also immersed, each in thirty minims of a solution of one 
part of the citrate to 875 of water; they were much acted 
on in 25 m.; and after 6 hrs. 35 m. almost all the tentacles, 
including those of the outer rows, were inflected, but not the 
blades. 
fodium, Oxalate of— Half-minims of a solution of one part to 
487 of water were placed on the discs of seven leaves; after 
5 hrs. 80 m. the tentacles of all, and the blades of most of them, 
were much affected. In 22 hrs., besides the inflection of the 
tentacles, the blades of all seven leaves were so much doubled 
over that their tips and bases almost touched. On no other 
occasion have I seen the blades so strongly affected. Three 
leaves were also immersed, each in thirty minims of a solution of 
one part to 875 of water; after 30 m. there was much inflection, 
and after 6 hrs. 35 m. the blades of two and the tentacles of all 
were closely inflected. 
Sudium, Chloride of (best culinary salt).—Half-minims of a 
solution of one part to 218 of water were placed on the diseg 
