2. (Christison’s flux.) Carbonate of soda (cryst.), 8 parts; charcoal (in fine powder), 1 part; heat the mixture gradually to redness. For reducing arsenic.

3. (Cornish reducing flux.) Crude tartar, 10 parts; nitre, 4 parts; borax, 3 parts; triturate together.

4. (Cornish refining flux, White flux.) Crude tartar and nitre, equal parts, deflagrated together. See Black Flux.

5. (Crude flux.) Same as BLACK FLUX, omitting the deflagration. Reducing.

6. (Fresenius’s flux.) Carbonate of potassa (dry), 3 parts; cyanide of potassium, 1 part. For the arsenical compounds.

7. (Liebig’s flux.) Carbonate of soda (dry) and cyanide of potassium, equal parts. As the last. See Arsenious Acid.

8. (Morveau’s reducing flux.) Powdered glass (free from lead), 8 parts; calcined borax and charcoal, of each, 1 part; all in fine powder, and triturated well together. Used as BLACK FLUX.

9. (White flux.) See above.

10. (Fluxes for enamels.) See Enamels.

11. (Various.) Borax, tartar, nitre, sal-ammoniac, common salt, limestone, glass, fluor spar, and several other substances, are used as fluxes in metallurgy.