Mendel has proved the correctness of these deductions by his experiments with peas, and by combining their color (yellow or green) with the chemical composition (starch or sugar) and other pairs of characters. I will now give two further illustrations afforded by crosses of the ordinary campion. I used the red-flowered or day-campion, which is a perennial herb, and a smooth variety of the white evening-campion, which flowers as a rule in the first summer. The combination of flower-color and pubescence gave the following composition for the second hybrid generation: Number % Calculation Hairy and red 70 44 56.25% Hairy and white 23 14 18.75% Smooth and red 46 23 18.75% Smooth and white 19 12 6.25% For the combination of pubescence and the capacity of flowering in the first year I found: Number % Calculated Hairy, flowering 286 52 56.25% Hairy, without stem 128 23 18.75% Smooth, flowering 96 17 18.75% Smooth, without stem 42 8 6.25% Many other cases have been tested by different writers and the general result is the [303] applicability of Mendel's formula to all cases complying with the given conditions. Intentionally I have chosen for the last example two pairs of antagonisms, relating to the same pair of plants, and which may be tested in one experiment and combined in one calculation. For the latter we need only assume the same conditions as mentioned before, but now for three different qualities. It is easily seen that the third quality would split each of our four groups into two smaller ones in the proportion of 3/4 : 1/4. We would then get eight groups of the following composition: 9/16 X 3/4 = 27/64 or 42.2% 9/16 X 1/4 = 9/64 " 14.1% 3/16 X 3/4 = 9/64 " 14.1% 3/16 X 1/4 = 3/64 " 4.7% 3/16 X 3/4 = 9/64 " 14.1% 3/16 X 1/4 = 3/64 " 4.7% 1/16 X 3/4 = 3/64 " 4.7% 1/16 X 1/4 = 1/64 " 1.6% The characters chosen for our experiment include the absence of stem and flowers in the first year, and therefore would require a second year to determine the flower-color on the perennial specimens. Instead of doing so I have taken another character, shown by the teeth of the capsules when opening. These curve outwards [304] in the red campion, but lack this capacity in the evening-campion, diverging only until an upright position is reached. The combination of hairs, colors and teeth gives eight groups, and the counting of their respective numbers of individuals gave the following: Teeth Hairs Flowers of capsules Number % Calculated