158 BOTANICAL GAZETTE [FEBRUARY 
While in the preceding experiments the number of shoots 
produced in sister leaves was not identical, yet it seemed of interest 
to find out whether the law of the production of equal masses of 
shoots by equal masses of sister leaves was true also if the number 
TABLE V 
APRIL 12—May 15 
P ‘ M f shoots 
apr oar of a < gies Weight « ae produced per 
20 left halves of leaves. .... aa 2.916 19.307 ISI 
20 right halves of leaves... . 31 2.790 18.466 151 
TABLE VI 
SISTER LEAVES, EACH CUT INTO TWO SYMMETRICAL HALVES; APRIL 3—May 4 
Mam. of shoots 
Stesey lnarun bist of [ioe val cuniee Misael = ed weer produced p per 
eft half.... 2 0.188 0.936 203 
1 t Right half... 2 0.183 2.959 Igt 
Left half. . I 0.202 1.000 200 
Leaf 2 iki ght half. . 2 ©.254 1.241 205 
‘Rig half. . I 0.057 0.427 133 
si : (Right half. . 2 0.053 ©.3098 133 
{Left half. . I 0.063 0.441 143 
Leaf 2 ‘Right half.. 1 0.056 0.398 141 
ae half. . I 0.120 0.820 146 
Leaf 1 (he ht half... 5 o.311 0.738 146 
III. a 
I 0.116 O.-713 163 
Leaf 2 Right naif.” I 0.115 0.721 160 
Left half... . I P=. 9-070 ©.407 141 
Leaf ‘Tight half... I 0.072 0.580 124 
ay Left half... 2 0.073 0.505 122 
— % Rice Hails. I 0.068 O.522 130 
of shoots produced in the two leaves differed considerably. For 
this purpose one leaf was cut into 4 pieces while its sister leaf 
remained intact. The whole leaves produced fewer shoots than 
the leaves cut into 4 pieces; nevertheless, the masses of shoots 
produced in the two sets of leaves remained the same. Thus 12 
