v. (UN-2 4.)

1

[1775.  Ash.]

2

1840.  R. H. Dana, Bef. Mast, xxx. By unplugging the holes, we let the soap-suds off the decks.

3

1876.  Preece & Sivewright, Telegraphy, 270. The whole of the resistance in each arm … should be unplugged.

4