But we have better evidence on this subject than mere theoretical calculations, namely, the numerous recorded cases of the astonishingly rapid increase of various animals in a state of nature, when circumstances have been favourable to them during two or three following seasons.
Baina gai honi buruz badugu kalkulu teoriko hutsak baino froga hoberik, alegia, natur egoeran zenbait animaliak izaniko gehikuntza harrigarriro azkarra, hiruzpalau urte segitutan horretarako inguruabar egokiak gertatu direnean.