Verb

(head)

(plunge)

* {{quote-book, year=1879 , title=The Telephone, the Microphone and the Phonograph

, author=Th Du Moncel , page=166 , publisher=Harper , passage=He takes the prepared charcoal used by artists, brings it to a white heat, and suddenly plunges it in a bath of mercury, of which the globules instantly penetrate the pores of charcoal, and may be said to metallize it.}}