From its readiness to dissolve in all acids, and unite with other metals, it is used in alloy with them in the composition of brass, &c. Thin sheets of zinc are also used to cover roofs of houses, and in the manufacture of various household utensils.
What is Lapis Calaminaris?
Lapis Calaminaris, or calamine stone, is a native carbonate of zinc, of some use in medicine, but chiefly in founding. It is, sometimes brownish, as that found in Germany and England, or red, as that of France. It is dug out of mines, usually in small pieces; generally out of those of lead. Calamine is mostly found in barren, rocky soils.
Founding, the art of casting metals.
CHAPTER XI.
Yams, Mangoes, Bread-fruit, Shea or Butter Tree, Cow Tree, Water Tree, Licorice, Manna, Opium, Tobacco, and Gum.
What are Yams?
The roots of a climbing plant growing in tropical climates. The root of the yam is wholesome and well-flavored; nearly as large as a man's leg, and of an irregular form. Yams are much used for food in those countries where they grow; the natives either roast or boil them, and the white people grind them into flour, of which they make bread and puddings. The yam is of a dirty brown color outside, but white and mealy within.
What are Mangoes?