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pearl ash

British  

noun

  1. the granular crystalline form of potassium carbonate

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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In the 1780s, American cooks started adding the chemical leavener pearl ash to their pancake batter.

From Slate ● Feb. 5, 2013

Sulphate of iron or copper, or both together, may be dissolved in water and then neutralized with common crude potash, or its carbonate or bicarbonate--known commonly as pearl ash and saleratus.

From American Hand Book of the Daguerreotype by S. D. (Samuel Dwight) Humphrey

The Doctor found that a mixture of pearl ash with soot, calcined by a very intense heat in a covered crucible, when cold caught fire on the affusion of water.

From James Cutbush An American Chemist, 1788-1823 by Edgar Fahs Smith

Book uses both pearl-ash and pearl ash; salmon-fly and salmon fly.

From Blacker's Art of Fly Making, &c. Comprising Angling, & Dyeing of Colours, with Engravings of Salmon & Trout Flies by William Blacker

In 1916 even under the stimulus of tenfold prices the amount of potash produced as pearl ash was only 412 tons—and we need 300,000 tons in some form.

From Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries by Edwin E. Slosson

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