1918] LOEB—CORRELATION 159 
intact leaves produced 25 shoots, while their sister leaves cut into 
4 pieces each produced soshoots. Yet the average weight of shoots 
produced per gm. of leaf was 156 mgm. for the intact leaves and 
TABLE VII 
SISTER LEAVES, ONE INTACT, THE OTHER CUT INTO FOUR PIECES; 
Aprit 18—May 18, 1917 
: ‘ M f shoo’ 
Stakes Lenten Number of |Weight sob shoots) Weight = leaves aaed roduc ed per per 
I pe i, Dias oe: 2 0.198 1.170 169 
* \Leaf 2, 4 pieces.... 4 ©. 2025 1.205 168 
Il. teat 1, intact... 2 0.216 1.596 138. 
Leaf 2, 4 pieces. ... 4 0.214 1.560 137 
Il. {reat nice ae 0.305 1.925 158 
eat 4 2, my sees: ce 4 0.368 2.110 174 
IV. a EV NtaCt ss ee °.340 1.9015 177 
Leaf 2, 4 pieces. .... aa | 0.2635 1.475 179 
V. per 1, intact...... 2 0.197 1.072 184 
Leaf 2, 4 pieces. ... 4 0.200 ¥.227 163 
VL {r eaf 1, intact...... 3 0.265 1.743 152 
Leaf 2, 4 pieces. ... 6 0.292 1.675 174 
afc, intact, oo: Ca 0.2415 1.741 138 
Vi. fle eaf 2, ee 4 0.255 1.745 146 
Real ft, intact... . I 0.195 1.260 155 
VII. chi f £ 4 pieces. : .. 4 0.109 0.660 165 
Ix. are su ote tos reese 2 0.218 1.198 182 
Leaf 2, 4 pieces. ... 4 ©. 209 1.110 188 
voc. 2 0.223 1.514 147 
X. teat 240 Pies 4 0.180 1.280 140 
XI. tee abe 4 0.258 1.820 142 
tat, : 7 aren aa 5 0.2615 1.818 144 
XI. ove eee 2 0.227 1.498 151 
Leaf 2, 4 pieces. ... 3 0.191 1.205 158 
Intact leaves 25 2.884 18.435 156 
Average Leaves cut 
into 4 pieces 50 2.747 17.070 161 
161 mgm. for the leaves cut into 4 pieces, in spite of the difference 
in the number of shoots produced. Table VII gives the results in 
detail. These experiments again confirm the conclusion that equal 
