Table 6/89.  Nicotiana tabacum.  Plants of the same parentage as those in
Table 6/88, but grown extremely crowded in two large pots.

Heights of plants measured in inches.

Column 1:  Kew-crossed Plants, from pot 2, Table 6/87.

Column 2:  Plants of the fourth Self-fertilised generation, from pot 2,
Table 6/87.

Column 3:  Kew-crossed Plants, from pot 5, Table 6/87.

Column 4:  Plants of the fourth Self-fertilised generation, from pot 5,
Table 6/87.

42 4/8 :  22 4/8 :  44 6/8 :  22 4/8. 34 :  19 2/8 :  42 4/8 :  21. 30 4/8 :  14 2/8 :  27 4/8 :  18. 23 4/8 :  16 :  31 2/8 :  15 2/8. 26 6/8 :  13 4/8 :  32 :  13 5/8. 18 3/8 :  16 :  24 6/8 :  14 6/8.

175.63 :  101.50 :  202.75 :  105.13.

The twelve tallest crossed plants in the two pots belonging to the two series average here 31.53, and the twelve tallest self-fertilised plants 17.21 inches in height; or as 100 to 54.  The plants on both sides, when fully grown, some time after they had been measured, were cut down close to the ground and weighed.  The twelve crossed plants weighed 21.25 ounces; and the twelve self-fertilised plants only 7.83 ounces; or in weight as 100 to 37.

The rest of the crossed and self-fertilised seeds from the two parent-plants (the same as in the last experiment) was sown on the 1st of July in four long parallel and separate rows in good soil in the open ground; so that the seedlings were not subjected to any mutual competition.  The summer was wet and unfavourable for their growth.  Whilst the seedlings were very small the two crossed rows had a clear advantage over the two self-fertilised rows.  When fully grown the twenty tallest crossed plants and the twenty tallest self-fertilised plants were selected and measured on the 11th of November to the extremities of their leaves, as shown in Table 6/90.  Of the twenty crossed plants, twelve had flowered; whilst of the twenty self-fertilised plants one alone had flowered.

Table 6/90.  Nicotiana tabacum.  Plants raised from the same seeds as in the last two experiments, but sown separately in the open ground, so as not to compete together.

Heights of plants measured in inches.

Column 1:  Kew-crossed Plants, from pot 2, Table 6/87.

Column 2:  Plants of the fourth Self-fertilised generation, from pot 2,
Table 6/87.

Column 3:  Kew-crossed Plants, from pot 5, Table 6/87.

Column 4:  Plants of the fourth Self-fertilised generation, from pot 5,
Table 6/87.

42 2/8 :  22 6/8 :  54 4/8 :  34 4/8. 54 5/8 :  37 4/8 :  51 4/8 :  38 5/8. 39 3/8 :  34 4/8 :  45 :  40 6/8. 53 2/8 :  30 :  43 :  43 2/8. 49 3/8 :  28 6/8 :  43 :  40. 50 3/8 :  31 2/8 :  48 6/8 :  38 2/8. 47 1/8 :  25 4/8 :  44 :  35 6/8. 57 3/8 :  26 2/8 :  48 2/8 :  39 6/8. 37 :  22 3/8 :  55 1/8 :  47 6/8. 48 :  28 :  63 :  58 5/8.

478.75 :  286.86 :  496.13 :  417.25