from The Century Dictionary and Cyclopedia
- n. In the soda industry, that part of soda-ball or black ash which is insoluble in water. It contains sulphids and hydrates of calcium, coal, and other matters.
Sorry, no etymologies found.
An oxysulphide, 2CaS·CaO, is sometimes present in "soda-waste," and orange-coloured, acicular crystals of 4CaS·CaSO_4·18H_2O occasionally settle out on the long standing of oxidized "soda - or alkali-waste" (see