Boiling down the blubber was, certainly, a tedious operation.
"Sugaring off," as the boiling down of the sap is called, is quite an event.
The first quality of rosin is prepared by boiling down Venice turpentine.
It would mean a boiling down of the products of every manufacturer we deal with, and skimming the cream off the top.
Every evening I ran up to see Jenny in the bush, ...