DOES HYBRIDISATION INCREASE FLUCTUATING VARIABILITY ? 109 
TABLE I.—WEIGHTS OF BEANS FROM FOUR “PURE LINES” 
AND THREE OF THEIR HYBRIDS (1905). 
n A a Vv Ss E 
Pure line SE (black) 414 36°9 6°47 17°5 —0°28 | —0-22 
Hybrids : : : 902 46°6 1°34 15°7 —0°38 | +0:24 
Pure line E (brown) C 446 59°7 6°25 105 | —019 | +0°69 
Hybrids Z ; : 421 548 7°14 13°0 —0'27 -0°14 
Pure line MM (brown) . 722 50°6 6:08 12:0 —0°32 +061 
Hybrids E = = 375 475°3 597 13°2 — 0:37 + 0°07 
Pure line BB (brown) ., 612 42-1 6:17 14-7 | —0°72 | +.0°84 
These numbers do not demonstrate any considerable difference 
between the variation of hybrids and pure lines. The hybrids have in 
most of the cases intermediate values between the values of their parent 
lines, but as to the “excess” the pure lines evidently have much larger 
deviation from the “ normal” curve than the hybrids. It is to be seen 
in all cases; and with exception of line SE, deviating negatively, the 
pure lines have a much higher excess than the hybrids. 
_ The same is to be seen in the variation of the dimensions. These are 
presented in the two following tables, giving respectively the measures of 
length and of breadth. Here all individuals of the pure lines have been 
measured ; the characteristics of the pure lines are therefore very true. 
In Table II. A and o are expressed in millimetres, the rest of the heading 
letters have the same significance as in Table I. 
TABLE IIl.—THE LENGTH OF BEANS FROM FOUR “ PURE LINES” 
AND THREE OF THEIR HYBRIDS (1905). 
n A o Vv s E 
Pure line SE (black). 414 14:53 0:92 64 | —062 | +0°66 
Hybrids . é : 902 13°92 O°S7 62 (a= 2249 + 0°96 
Pure line E (brown) . 6004 12-63 0-61 4:8 | —0°59 | +2°84 
Hybrids. : : 421 13°53 0°68 50 0:00 | +0:02 
Pure line MM (brown) . 5546 14-01 0-70 50 —0°79 | +3:08 
Hybrids. =|) 875. | 427 0°67 52 | -072 | +1:35 
Pure line BB (brown) . 6663 11°25 0°53 4:7 —0°68 | +401 
In Table III., giving the measures of breadth, A and o are also 
expressed in millimetres. In the column headed J the relative breadths 
are indicated, i.e. average breadth indices, J=100 breadth : length. 
TABLE III.—THE BREADTH OF BEANS FROM FOUR “ PURE LINES ” 
AND THREE OF THEIR HYBRIDS (1905). 
n A a AA Ss E J 
Pare line SE (black) .| -414 | 6:93 | 0:36) 5:2 | —O0°57 | +0°45 | 47-7 
Hybrids . : 902 1°81 | O42 | 54 | —0°35 | +073 | 56 
Pure line E (brown) . | 6004 9:01 | 0-71 | 46 | —0-60 | +1°33 | 71:3 
Hybrids 5 Pale 421: | §'39 | 0°40 | 47 —0°12 |-—0°42 | 620 
Bass, line MM (brown) .| 5546 | 7:72) O31 | 41 |) -0-45 | +107 | -5d°1 
Hybrids . : 375 7°86 | 034| 43 | —0°25 | +0°11_1.'61°6 
Pure line BB (brown) Pi 6663 -| 7:97 | O4Eira2 | —O-61 | +100 | 707 
