Sentence:  These fishermen procure from a boiling-down establishment, where diseased sheep, oxen, and horses are reduced to glue and other useful articles, the residuum, an awfully stinking substance called <WSD>Hashmagandy</WSD>,.... 
Meaning of the word marked with <WSD> tags:  Residue remaining after organic material is processed, such as at an abattoir, used as fertiliser or by anglers as bait.