variability in the silkworm, i. 304;
supposed species of wheat, i. 312-314;
on Ægilops triticoides, i. 313;
variable presence of barbs in grasses, i. 314;
colours of the seeds of maize, i. 321;
unity of character in cabbages, i. 323;
correlation of colour and odour, i. 325;
effect of heat and moisture on the cabbage, i. 325;
on the cultivated species of Brassica, i. 325;
on the Rouncival and sugar peas, i. 327;