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moth learning to perf[orm] [page torn]

this [illeg] difficult = operation.)

(When there is exists an inherited inherited or instinctive tendency to the performance certain action or towards  or to the proper certain tastes, taste food &c, some degree of [illeg] habit in the individual is often or generally requisite. We see when usually  find this in the [illeg] paces canters of horses, & to a certain extent in the pointing of dogs; though let some young dogs, as I have seen,  I have seen observed a young dots pointer   one which pointed will point excellently the first time they were they are it was are taken out, though often associating the act proper movements with wrong fallen odours & even with or eyesight. I have heard it posi asserted that if a calf has been be allowed to suck its mother only once, it is very  much more much more difficult afterwards break the habit &  to rear it by hand.*(3) Caterpillars which have never been allowed to eaten  of on the leaves of one kind of tree, will have been known to perish from hunger rather than to feed on eat the tre leaves of another tree on which is their naturally &  affords  affords them their proper food & or [illeg] good. feed, & natural food, *(4) & so it is in with many  other tastes. *(4) instances.

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[mathematical notes by George Darwin]