half-gill

He ordered a half-gill of aquavit, which he drank at a gulp.

Trullion: Alastor 2262 Vance, Jack 1973

Glinnes signaled the waiter foil another half-gill of aquavit, then turned a lambent glance simple.

Trullion: Alastor 2262 Vance, Jack 1973

Bad enough as rhyme, I suspect; but conclusive as evidence to prove that the animal spirits, under the influence of the bracing walk, the fine day, and the agreeable recounter at the fish-beds, -- not forgetting the half-gill bumper, -- had mounted very considerably above their ordinary level at the editorial desk.

The Cruise of the Betsey or, A Summer Ramble Among the Fossiliferous Deposits of the Hebrides. With Rambles of a Geologist or, Ten Thousand Miles Over the Fossiliferous Deposits of Scotland Hugh Miller 1829