172 BROOKLYN BOTANIC GARDEN MEMOIRS 
The primordial leaves of the abnormal plants in which the two 
cotyledons are slightly separated are, as shown in Table II, lighter 
TABLE II 
Mean Dry Weight per Plant of Primordial Leaves and of First Compound Leaf 
Primordial Leaves First Compound Leaf 
SOUS | : Percentage : | Percentage 
| Abnormal | Control Difference | Difference} Abnormal | Control | Difference | Difference 
2 OLAS Ee O53)740 |) =. 0002 Lau .0442 | .0517 | —.0075 | 14.5 
35 | .0366 | .0483 —.O117 | 24.2 .0465 10530 |) 20065) |peress 
BO) 0422 |) 50457; |) 0035 |" 17-7 .0476 | 0499 | —.002 4.6 
39 ~+| .0409 | .0467 —.0058 12.4 .0430 | .0470 | —.o040! 8.5 
40 0438 | .O5II 0073, 14:3 .O415 0496 | —.0081 | 16:3 
4I | .0431 .0526 »| —.0095 LSet .0406 | 0494 | —.0088 | 1728 
2 .0416 | .0504 | —.0088 17.5 .0383 0519, | —.0136 | 26% 
43 0429 | .0532 —.0103 19.4 0391 | .0493 | —.O102 20.7 
46 .0408 | .O501 — .0093 18.6 .0400 | .0492. | —.0092 | 18.7 
47 .0442 | .0446 — .0004. 9 0442 | .0433 =-<0009) | 228 
ASH y\esc0420) |) 0464) 15-0044 5) 1955 0444 | .0525 —.0081 | 15.4 
AQw |) -OZ8L i) LO4260)|/—— 0055 12.6 0397 | .0472 —.0075 | 15.9 
53 0365 | .0410 | —.0045 11.0 0399 | .0427 | —.0028 | 6.6 
54 .0384 0445 | —=20061 4|| 13-7 .0339 | .0412 —.0073 Wy 
56 | .0349 | .04g1 —.0142 ; 28.9 .0331 | .0395 —.0064 ! 162 
61 0356 | .0402 —.0046 11.4 .0383 .0417 —.co34 | 8.2 
64) | .6354 | <c438" || —10084: 19.2 .0341 .0435 | —.0094 | 21.6 
65 .0357 {OATO™ 9.0053) 02 L2.9 .0344. 0398 | —.0054 | 13.6 
66 .0354 -0395 —.0041 | 10.4 .0381 +0439) ||. —.0058) |) 3s2 
76 .0426 | .0465 —.0039 | 8.4 .0407 .0438 —.0031 | Fal 
{ime |) 0279" || 03035 |) —-0024 7.9 .0274 0299 | —.0025| 8.4 
72 10273; || .04074) |) —.0134 32.9 .0265 0392 | —.0127 | 32 
73205 0298 .0378 —.0080 212 .0315 .0408 | —.0093 22.8 
than those of the normal controls in every instance. The average 
dry weight of the abnormal is .0382, that of the control .0452 and the 
average difference is —.0070 grams. If the differences be expressed 
as a percent of the control value as a base, they range from less than 
I to nearly 33 percent, with a general average of 15.21 percent. 
The results for the first compound leaf are very similar. In 22 of 
the 23 cases the primordial leaves of normal plants yield a greater 
weight of dry substance than those of the abnormal plants. The 
exception to the rule is again sample 47. The average dry weight 
of the first compound leaf of abnormal plants is .0385, that of normal 
plants is .0452 and the average difference is —.0067 grams. If the 
differences be expressed as percentages of the control constants they 
are seen to range from 3.2 to 26.2, for the 22 series in which the ab- 
normal plants produce a smaller amount of dry substance. The differ- 
ence in the single exceptional series is small, only 2.1 percent as com- 
pared with a general average of 13.36 percent in the 23 samples. 
