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Show 184 DROSERA ROTUNDIFOLIA. CHAP. VIIL . Th leaves were then removed and inflected and disc~loured. . bet they never re-expanded, being left for two days In water' u evidently dead. 1 es I·mmerscd in ninety minims z~.n c, C~l~ l 'J o-~'-Thrce eav d . orwe 'J • 437 f water were not affccte m of a solution of one part to 0 25 hrs. 30m. . F leaves were immersed in 120 Aluminium, Chl~nde of.~ 0~1~t to 437 of water; after 7 brs. minims of .a sol~tw~ 0ft ~n 24 P hrs. one ]oaf rather closely, the 45 m. no Inflectwn' a tr d nd fourth hardly at all, inflected. second :modera~ely, the f ~u b:t I thi~nk some power in slowly The .ev1~ence :s doubt ~'attributed to this salt. These leaves causing 1nflectwn musht e 1 t' n (1 O'r to 20 oz) of phosphate h l d in t e so u IO e;, • • • were t en .Pace hrs 30 m. the three, which had b~en of ammonia, and daftber 7th . hloride became rather closely m-but little affecte Y e c ' fleeted. . . T' • o -Four leaves were immersed in 120 .Alum~n~um, A ~~1 ate if'. art to 437 of water; after 7 hrs. Ininims of a solutwn °~ one pf inflection. after 24 ]us. one leaf 45 m. there was ?niy ~ ;ac;~e evidence is here again doubtful, wa~ moderately In ;c e hioride of aluminium. The leaves were as In the case of t e c . n as before of phosphate of then transferred to the same solutiO ' . 7' h 30 . b t . . d d h dly any effect In rs. m. ' u a~~o~~a ;h;~Is ;:: ~~~; wa:r pretty closely inflected, the three a er . b t more so than from water. others very slightly, per .aps ~o l 7 t if (common alum).- Half- Aluminium and Potas.c;zum, u :pIa e o I d the minims of a solution of the usual strength were pace on d. s of nine leaves but produced no effect. . IS~old Chloride of:-seven leaves were immersed In hso ~uc? odf '. art to 437 of water that eac Ieceive a so~u~wn oft o:n~ p 1 of a grain or 4·04H mg., of the chloride. 30 mmims, con ai~Ing T~ c. 8 ' which became extreme in There was some Inflection In m., l d 45 I 3 hrs the surrounding fluid was coloured purp e, an them g.l andns were · bl ac k ene d · After 6 hrs · the lcn,v.c s wore tdr ansd-ferred to wat er,. next morning they were found disc1o1l ou·are anr y evident! killed. The secretion decompo.ses the c 1 on. e vc readily ;Y the glands themselves hecomm~ 1 co~ed1 w~~~t ~~~ thinnest layer of metallic. gold, . and partie cs oa a the surface of the surrounding fluid. . d . ninety Lead, Chloride of.- Three ]~aves were Immerse .m. hrs inims of a solution of one part to 437 of water. After 23 . ~ere was not a trace of inflection; _the glands were ~ot ~lac~:~~~ a~d the leaves did not appear InJured. They were t en CHAP. VIII. EFFECTS OF 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 (if.-Four loaves 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 surrounding 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. Antimony, Tartrate <f.-Three leaves were immersed in ninety minims of a solution of one part to 437 of water. After 8 hrs. 30m. there was slight inflection; after 24 hrs. two of the leaves were closely, and the third 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 Aciri.-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 qf.-Three leaves were immersed in ninety minims of a solution of one part to 437 of water; in 8 hrs. no inflection ; but after 21 hrs. considerable inflection; glands blackened; fluid coloured yellow, with flo~ting 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. considerable, inflection ; after 2 hrs. all the tentacles closely inflected, with the glands discoloured. Placed in water, next day leaves quite discoloured and evidently killed. Manganese, Chloride of.-Tbree 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 brs. Copper, Chlon'de nf.-Three leaves immersed in ninety minims |
