Page:Life Movements in Plants.djvu/214

184 region of growth. Tho Specimen is then enclosed in a glass cylindt-r, with inlet and ontlot pipes. The cylinder is ﬁrst lillod with wator, and the normal rate of growth rocordml. This rate rmnuins constant for several hours; hut prowntion ol' :lCtHn‘H of air for too long a time all'ects tho normal growth. After obtaining normal record, 'wut-er ohnrgwl with the giving ohvmicnl agent is passed into tho cylindvr; and tho subsequent record shows the character— istic oll't-ot of HM- rmtgont. The intrmlnction of a gas into tho ohnmhor oll't-rs no dillionlt)‘.

l.

//_I/r/I‘_r/PN I’m'm'irll': lair/wrian ('2.-—-—This reagent, as supplh-d by Munro's. lurkv lhtvis &. o., was (lilutvd to l por wont. zmd applied to tho growing plant. [ls stimulating
 * utlion on growth is dvhlomtrutwl in the right hand record

of Mg. F.8d, wlu-rv Llll' rate of growth is soon enhanced

t.\vo and a hull" times tho normal rate.

Flt} t'\ ~l".'-" ' ' - '\ -.r. . -. ' ‘ “H‘ "‘ d" m“ "1 'UMS- (“l Aci‘elcrntmn or growth under [1.302, 1M l'ltl'm't of N” H Pl‘t'llllllll.ll‘_\' :H‘t‘c'lt‘l'll'luli folloWL-d lw retardation. (c) Effect Of (‘lllt'n (H) and rt't'nvvry (A).

Amnmnm .- EJ‘I‘erimmt (iii—The immediate ell'ect of dllm“ mPM” of this rungont i4 an enhancement of growth,