. Carnegie Institution of Washington publication. 140 Hydration and Growth. Opuntia, March 25 to April 24. in weight of disk-shaped sections taken from the joints at sunrise and sunset, with the results shown in table 106. (Fig. 30.) These results afford a comparison only between conditions at the beginning and end of the daylight period and the time of the maximum and minimum imbibition capacity was not determined as in Mesem- bryanthemum. (See p. 145). Mr. Long also tested the effects of acids, hy- TABLE 107.—Growth of flower-buds of droxids, and salts upon the growth of Opuntia. Preparation
. Carnegie Institution of Washington publication. 140 Hydration and Growth. Opuntia, March 25 to April 24. in weight of disk-shaped sections taken from the joints at sunrise and sunset, with the results shown in table 106. (Fig. 30.) These results afford a comparison only between conditions at the beginning and end of the daylight period and the time of the maximum and minimum imbibition capacity was not determined as in Mesem- bryanthemum. (See p. 145). Mr. Long also tested the effects of acids, hy- TABLE 107.—Growth of flower-buds of droxids, and salts upon the growth of Opuntia. Preparations for this purpose consisted of mature joints bearing young flower-buds. The bases of the joints were suspended with their freshly cut surfaces in solutions in glass jars, and the lengths of the buds were taken at intervals of 3 or 4 days. The final amount of growth in each case is given in table 107. (Fig. 31.)1 Total growth Medium. increment Time. before flowering. mm. days. Distilled water. . 42 0 27 N/50 NaOH. 40 5 30 N/50 malic acid. . 28 N/50HC1 31 0 28 m. m. m. m. m. J i i t ,' / ; I ; t ' i l 1 ___^ - I 1 — • r fc — ^' NOV. e;, 1916 1 t i j 1 n. n i. n i. 12 n "i. 12 r T. 12 n 12 t n. 12 1 1 i \ I — — -{— H i "^ i ] — T~ -~~ 1 1 i l DEC. 2^, 1916 i i i i i n i. 12 n i. n i. IT r i. n i. n i I 1 i i i j 1 1 1 1 1 i r~ — i i ^ 1 — — j : — 1 — -^ 1 1 |7l9l7 1 Icioudyl and rspny all week 1 i i 1 r n. 12 n i. n i. n i. 12 rr 12 n i. 12 rr i. 1 1 i ! i } n 1 1 : i ! 1 \ \ \y i \ t" ^ 1 - TV ^ \ ""' s ^ ' \ 1 \ \ \ \ \ \ '» \v*= I \ \\/ — \ — -N i ^ ''^ \ \ \ \ \ \ \ > \ \ \ \ i^ ^~~~C^ vv / — "i — • \FEB. I8N, 1917 \ \ \ \ \ \ \ \ \ \ \ \ m. m. m. 12 rn^ 12 m. 12 m. 1 1 I i 1 1 1
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