gall

Even so, Redi retained a belief that in certain other cases—the origin of parasites inside the human or animal body or of grubs inside of oak galls—there must be spontaneous generation. Bit by bit the evidence grew against such views. In 1670 Jan Swammerdam, painstaking student of the insect’s life cycle, suggested that the grubs in galls were enclosed in them for the sake of nourishment and must come from insects that had inserted their semen or their eggs into the plants.

But first for your Line. First note, that you are to take care that your hair be round and clear, and free from galls, or scabs, or frets: for a well- chosen, even, clear, round hair, of a kind of glass-colour, will prove as strong as three uneven scabby hairs that are ill-chosen, and full of galls or unevenness. You shall seldom find a black hair but it is round, but many white are flat and uneven; therefore, if you get a lock of right, round, clear, glass-colour hair, make much of it.