Sentence:  In both caſes they let the ſalt remain in the pan till the whole is finiſhed; then they rake it out with wooden rakes, and after it has drained a-while in wooden <WSD>drabs</WSD>, it is fit for uſe. The mother-brine, of which there always remains a large quantity in the pan after the ſtrong ſalt is made, as alſo the drainings of the <WSD>drabs</WSD> where the ſalt is put, is reſerved to be boiled up into table-ſalt; [...] 
Meaning of the word marked with <WSD> tags:  A box used in a saltworks for holding the salt when taken out of the boiling pans.