"Whether they will retain the characteristics of the hybrid, or whether they will show variations, will be determined by next year's observations."

"The most important result of hybridization is beyond doubt the production of new constant forms."

"The numerical relations of the different forms in the successive generations are constant."

"It requires a good deal of courage to undertake such extensive experiments."

"The value of the experiment as a means of solving questions of evolution must not be underestimated."