Chap. VUI. EFFECTS OP VARIOUS SALTS. 185 



ferred to the solution (1 gr. to 20 oz.) of phosphate of ammonia, 

 and after 24 hrs. two of them were somewhat, the third very 

 little, inflected ; and they thus remained for another 24 hrs. 



Tin, Chloride of. — Four leaves were immersed in 120 minims 

 of a solution of about one part (all not being dissolved) to 437 of 

 water. After 4 hrs. no effect ; after 6 hrs. 30 m. all four leaves 

 had their submarginal tentacles inflected ; after 22 hrs. every 

 single tentacle and the blades were closely inflected. The sur- 

 rounding fluid was now coloured pink. The leaves were washed 

 and transferred to water, but next morning were evidently dead. 

 This chloride is a deadly poison, but acts slowly. 



Antimmiy, Tartrate of. — Three leaves were immersed in ninety 

 minims of a solution of one part to 437 of water. After 8 hrs. 

 30 m. there was slight inflection; after 24 hrs. two of the leaves 

 were closely, and the thii'd moderately, inflected ; glands not 

 much darkened. The leaves were washed and placed in water, 

 but they remained in the same state for 48 additional hours. 

 This salt is probably poisonous, but acts slowly. 



Arsenious Acid. — A solution of one part to 437 of water ; three 

 leaves were immersed in ninety minims ; in 25 m. considerable 

 inflection ; in 1 h. great inflection ; glands not discoloured. -After 

 6 hrs. the leaves were transferred to water ; next morning they 

 looked fresh, but after four days were pale-coloured, had not 

 re- expanded, and were evidently dead. 



Iron, Chloride of. — Three leaves were immersed in ninety 

 minims of a solution of one part to 437 of water ; in 8 hrs. no 

 inflection; but after 24 hrs. considerable inflection; glands 

 blackened; fluid coloured yellow, with floating flocculent 

 particles of oxide of iron. The leaves were then placed in 

 water ; after 48 hrs, they had re-expanded a very little, but I 

 think were killed ; glands excessively black. 



Chromic Acid. — One part to 437 of water; three leaves were 

 immersed in ninety minims ; in 30 m. some, and in 1 hr. con- 

 siderable, inflection; after 2 hrs. all the tentacles closely in- 

 flected, with the glands discoloured. Placed in water, next 

 day leaves quite discoloured and evidently killed. 



Manganese^ Chloride of. — Three leaves immersed in ninety 

 minims of a solution of one part to 437 of water ; after 22 hrs. 

 no more inflection than often occurs in water; glands not 

 blackened. The leaves were then placed in the usual solution 

 of phosphate of ammonia, but no inflection was caused even 

 after 48 hrs. 



Copper, Chloride of, — Three leaves immersed in ninety minims 



