A practical treatise on the manufacture of soap and candles .. (1888)
Brannt, William T. (William Theodore), b. 1844, Deite, C. (Carl), 1838-1921, Engelhardt, Alwin, Schaedler, Karl, 1843-1891 · Philadelphia, H. C. Baird & co.; [etc., etc.] · leaf 272
S. 253 cock C or H to increase or diminish the heat, or to stir orleave the contents of the vats MM at rest. To prevent the contents of the kettle from rising and boilingover, as they are apt to do when saponification is taking place,and also later on after the steam is turned off, a little piece…
Soap · Candles · Decorative arts
Internet Archive · Clark Art Institute Library · Public Domain Mark 1.0. Free to use for anything.