Cusp. VIL] PHOSPHATE OF AMMONIA. 133 
more affected after 12 hrs. than the four corresponding ones in 
water; but after 24 hrs. they were slightly more inflected. Such 
evidence, however, is not at all trustworthy. 
Twelve leaves were immersed, each in thirty minims of a solution 
of one part to 1,312,500 of water (1 gr. to 8000 0z.); so that each leaf 
received zg4g5 of a grain (00185 mg.). The leaves were not in very 
good condition ; four of them were too old and of a dark red colour; 
four were too pale, yet one of these latter acted well; the four others, as 
far as could he told by the eye, seemed in excellent condition. The 
result was as follows :— 
(1) This was a pale leaf; after 40 m. about thirty-eight tentacles 
inflected ; after 3 hrs. 30 m, the blade and many of the outer tentacles 
inflected; after 10 hrs. 15 m. all the tentacles but seventeen inflected, 
and the blade quite doubled up; after 2+ hrs. all the tentacles but ten 
more or less inflected. Most of them were closely inflected, but 
twenty-five were only sub-inflected. 
(2) After 1 hr. 40 m. twenty-five tentacles inflected; after 6 hrs. all 
but twenty-one inflected; after 10 hrs. all but sixteen more or less 
inflected ; after 24 hrs. re-expanded. 
(8) After 1 hr. 40 m. thirty-five inflected; afier 6 hrs. “a large 
number” (to quote my own memorandum) inflected, but from want of 
time they were not counted; alter 24 hrs. re-expanded. 
(4) After 1 hr. 40 m. about thirty inflected; after 6 hrs. “a large 
number all round the leaf” inflected, but they were not counted; after 
10 hrs. began to re-expand. 
(5) to (12) These were not more inflected than leaves often are in 
water, having respectively 16, 8, 10, 8, 4, 9, 14, and 0 tentacles 
inflected. ‘Two of these leaves, however, were remarkable from having 
their blades slightly inflected after 6 hrs. 
With respect to the twelve corresponding leaves in water, (1) had, 
after 1 hr. 35 m., fifty tentacles inflected, but after 11 hrs. only twenty- 
two remained so, and these formed a group, with the blade at this 
point slizhtly inflected. It appeared as if this leaf had been in some 
manner accidentally excited, for instance by a particle of animal matter 
which was dissolved by the water. (2) After 1 hr. 45 m. thirty-two 
tentacles inflected, but after 5 hrs. 30 m. only twenty-five inflected, 
and these after 10 hrs. all re-expanded; (3) after 1 hr. twenty-five 
inflected, which after 10 hrs. 20 m. were all re-expanded ; (+) and (5) 
after 1 hr. 35 m. six and seven tentacles inflected, which re-expanded 
after 11 hrs.; (6), (7) and (8) from one to three inflected, which soon 
re-expanded; (9), (10), (11) and (12) none inflected, though observed 
for 24 hrs. 
Comparing the states of the twelve leaves in water with those in the 
solution, there could be no doubt that in the latter a larger number of 
tentacles were inflected, and these to a greater degree; but the evidence 
was by no means so clear as in the former experiments with stronger 
solutions. It deserves attention that the inflection of four of the leaves 
