214 
DROSERA ROTUNDIFOLIA. 
Cuapr. 13 
and then placed in the phosphate solution : in 2 hrs. 15 m. there 
was a trace of inflection in one leaf, and in 5 brs. 80 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. 
Name of the Salts and 
Acids in Solution. 
Period of 
Tmmersion 
of the 
Leaves in 
Solutions 
of one part 
to 437 of 
water. 
Effects produced on the Leaves by their subse- 
quent Immersion for stated periods in a 
Solution of one part of phosphate of 
ammonia to 8750 of water, or 1 gr. to 
20 07. 
Rubidium chloride . 
Potassium carbonate 
Calcium acetate 
Calcium nitrate . 
Magnesium acetate. 
Magnesium nitrate . 
Magnesium chloride} 
Barium acetate . 
Barium nitrate . 
Strontium acetate . 
Strontium nitrate . 
Aluminium chloride 
22 hrs. 
20 m. 
.| 24 hrs. 
.| 24 hrs, 
22 hrs. 
22 hrs. 
22 hrs. 
.| 22 hrs. 
22 hrs. 
22 hrs. 
22 hrs. 
24 hrs. 
After 30 m. strong inflection of the 
tentacles. 
Searcely any inflection until 5 hrs. 
had elapsed. 
After 24 hrs. very slight inflection. 
Do. do. 
Some slight inflection, which became 
well pronounced in 2+ hrs. 
After 4 hrs. 30 m. a fair amount of 
inflection, which never increased. 
After a few minutes great inflection ; 
after 4 hrs. all four leaves with almost 
every tentacle closely inflected. 
After 24 hrs. two leaves out of four 
slightly inflected. 
After 30 m. one leaf greatly, and two 
others moderately, inflected; they 
remained thus for 24 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 
remained for 24 hrs. 
After 8 hrs. three leaves out of five 
moderately inflected ; after 24 hrs. 
all five in this state; but not one 
closely inflected. 
Three Jeaves which had either been 
slightly or uot at all affected by the 
ehloride became after 7 hrs. 30 m 
rather closely inflected. 
