DCHP-1 Online
black salts Hist. 
See quotes.
- 1819 Twenty-five Cwt. of clean black salts will make one ton of pearl ash.
- 1853 After the lye is run off it is boiled down into black salts, which are melted into pot-ash, and packed into air-tight barrels ready for market.
- 1904 . . . "blacksalts" [were] a product of the leached ashes of burnt logs and timber, rendered into potash and pearl ash and brought by the early merchants for export.
- 1819 Twenty-five Cwt. of clean black salts will make one ton of pearl ash.