Note {212} — Chapter I · ON THE VARIATION OF ORGANIC BEINGS UNDER DOMESTICATION; AND ON THE PRINCIPLES OF SELECTION
Reading edition
«Note in the original.» “It appears that slight changes of condition «are» good for health; that more change affects the generative system, so that variation results in the offspring; that still more change checks or destroys fertility not of the offspring.” Compare the Origin, Ed. i. p. 9, vi. p. 11. What the meaning of “not of the offspring” may be is not clear.