Oak-galls Sentence Examples

Oak-galls, for example, are broken open by the titmouse in order to obtain the grub within, and the " button-galls " of Neuroterus numismatis, Oliv., are eaten by pheasants.

Gallic acid is most readily obtained by boiling the tannin procured from oak-galls by means of alcohol and ether with weak solution of acids.

What in California are known as " flea seeds " are oak-galls made by a species of Cynips; in August they become detached from the leaves that bear them, and are caused to jump by the spasmodic movements of the grub within the thin-walled gall-cavity."