spermaceti-whale

To the qualities of the oils thus described, it is to be added, that an individual has discovered methods, 1. of converting a great part of the oils of the spermaceti-whale, into the solid substance called spermaceti, heretofore produced from his head alone; 2. of refining the Greenland whale-oil, so as to take from it all smell, and render it limpid and luminous as that of the spermaceti-whale; 3. of curdling the oil of the Brazil whale into tallow, resembling that of beef, and answering all its purposes.

Memoir, Correspondence, And Miscellanies, From The Papers Of Thomas Jefferson, Volume 2