It is certain that many more good variations would be discovered if trained people were everywhere on the lookout for them, and it must be remembered that among the cereals, for example, a good new strain will not be a conspicuous object like a red sunflower. There is here a fascinating field for amateurs, with possibilities of vastly increasing the wealth of mankind, or adding beauty to his gardens. Aside, however, from the discovery of new things, there is an almost unlimited field open for the crossing of known varieties, and their recombination along Mendelian lines. Any one who has a garden may do this work, and if nothing else comes of it, it will certainly give much pleasure and an insight into some of the most interesting biological problems of the day.