214 DROSERA ROTUNDIFOLIA. Cuap. IX 
and then placed in the phosphate solution : in 2 hrs. 15 m. there 
was a trace of inflection in one leaf, and in 5 hrs. 30 m. a second 
was slightly affected; the inflection subsequently increased, 
though slowly. Hence diluted alcohol, which, as we shall see, is 
hardly at all poisonous, plainly retards the subsequent action of 
the phosphate. 
It was shown in the last chapter that leaves which did not 
become inflected by nearly a day’s immersion in solutions of 
various salts and acids behaved very differently from one an- 
other when subsequently placed in the phosphate solution. I 
here give a table summing up the results. 
Period of : 
Immersion | Effects produced on the Leaves by their subse- 
of the quent Immersion for stated periods in a 
Name of the Salts and | Leaves in Solution of one part of phosphate of 
Acids in Solution. Solutions ammonia to 8750 of water, or 1 gr. to 
of one part 20 oz. 
to 437 of 
water. 
Rubidium chloride .| 22 hrs. | After 30 m. strong inflection of the 
tentacles. 
Potassium carbonate] 20m. | Scarcely any inflection until 5 hrs. 
had elapsed. 
Calcium acetate | 24 hrs, { After 24 hrs. very slight inflection., 
Calcium nitrate. .| 24 hrs. Do. do. 
Magnesium acetate.| 22 hrs. | Some slight inflection, which became 
well pronounced in 24 hrs. 
Magnesium nitrate .| 22 hrs. | After 4 hrs. 30 m. a fair amount of 
inflection, which never increased. 
Magnesium chloride] 22 hrs, | After a few minutes great inflection; 
after 4 hrs. all four leaves with almost 
every tentacle closely inflected. 
Barium acetate. .| 22 hrs. | After 24 hrs. two leaves out of four 
slightly inflected. 
Barium nitrate. .| 22 hrs. | After 30 m. one leaf greatly, and two 
others moderately, inflected; they 
remained thus for 24 hrs. 
Strontium acetate .| 22 hrs. | After 25 m. two leaves’ greatly in- 
flected; after 8 hrs. a third leaf 
moderately, and the fourth very 
slightly, inflected. All four thus 
g remained for 24 hrs. 
Strontium nitrate .| 22 hrs. | After 8 hrs. three leaves out of five 
moderately inflected ; after 24 hrs. 
: all five in this state; but not one 
closely inflected. 
Aluminium chloride} 24 hre. | Three leaves which had either beer 
slightly or uot at all affected by the 
chloride became after 7 hrs. 30 m 
rather closely inflected. 
