148 DROSERA ROTUNDIFOLIA. [Chap. VIII. 



an inwot might have alighted on it and then escaped; the five 

 other leaves wore in no way affected. I tested three of thcae 

 leaves with bits of meat, and after 24 hra. they became splendidly 

 inflected. Three leaves were also immersed for 21 hrs. in 30 min- 

 ims of a solution of one part to 875 of water; but they wtre not 

 at all affected, excepting that the glands looked rather pale. 



Lithium, Acetate of. Four leaves were immersed together in a 

 vessel containing 120 minims of a solution of one part to 437 of 

 water; so that each received, if the leaves absorbed equally, y^ of a 

 grain. After 24 hrs. there was no inflection. I then added, for the 

 sake of testing the leaves, some strong solution (viz. 1 gr. to 20 oz., 

 or one part to 8750 of water) of phosphate of ammonia, and all 

 four became in 30 m. closely inflected. 



Lithium, Nitrate of. Four leaves were immersed, as in the last 

 case, in 120 minims of a solution of one part to 437 of water; after 

 1 hr. 30 m. all four were a little, and after 24 hrs. greatly, in- 

 flected. I then diluted the solution with some water, but they 

 still remainetl somewhat inflected on the third day. 



Ccrsium, Chloride of. Four leaves were immersed, as above, in 

 120 minims of a solution of one part to 437 of water. After 1 hr. 



5 m. the glands were darkene<l; after 4 hrs. 20 m. there was a 

 trace of inflection; after hrs. 40 m. two leaves were greatly, but 

 not closely, and the other two considerably inflected. After 22 hrs. 

 the inflection was extremely gieat, and two had their blades in- 

 flected. I then transferred the leaves into water, and in 46 hrs. 

 from their first immersion they were almost re-expanded. 



Rubidium, Chloride of. Four leaves which were immersed, as 

 above, in 120 minims of a solution of one part to 437 of water, were 

 not acted on in 22 hrs. I then addeil some of the strong solution 

 (1 gr. to 20 oz.) of phosphate of ammonia, and in 30 m. all were 

 immensely inflected. 



Silver, Nitrate of. Three leaves were immersed in ninety 

 minims of a solution of one part to 437 of water; so that each re- 

 ceived, as before, i^g- of a grain. After 5 m. slight inflection, and 

 after 11m. very strong inflection, the glands becoming excessively 

 black; after 40 m. all the tentacles were clo.sely inflected. After 



6 hrs. the leaves were taken out of the solution, washed, and 

 placed in water; but next morning they were evidently dead. 



Calcium, Acetate of. Four leaves were immersed in 120 minima 

 of a solution of one part to 437 of water; after 24 hrs. none of the 

 tentacles were inflet^ted, excepting a few where the blade joined the 

 petiole; and this may have been caused by the absorption of the 

 salt by the cut-off end of the petiole. I then added some of the 

 solution (1 gr. to 20 oz.) of phosphate of ammonia, but this to my 

 surprise excited only slight inflection, even after 24 hrs. Hence 

 it would appear that the acetate had rcndere<l the leaves torpid. 



Calcium, Nitrate of. Four leaves were immerseil in 120 minims 

 of a solution of one part to 437 of water, but were not affected in 

 24 hrs. I then addeil some of the solution of phosphate of am- 

 monia (1 gr. to 20 oz.), but this caused only very slight inflection 

 after 24 hrs. A fresh leaf was next put into a mixed solution of 



