Table of the Combinations of Pyro-mucous Acid, with the Salifiable Bases, in the Order of Affinity(A).
| Bases. | Neutral Salts. | ||
| Potash | Pyro-mucite of | potash. | |
| Soda | soda. | ||
| Barytes | barytes. | ||
| Lime | lime. | ||
| Magnesia | magnesia. | ||
| Ammoniac | ammoniac. | ||
| Argill | argill. | ||
| Oxyd of | |||
| zinc | zinc. | ||
| manganese | manganese. | ||
| iron | iron. | ||
| lead | lead. | ||
| tin | tin. | ||
| cobalt | cobalt. | ||
| copper | copper. | ||
| nickel | nickel. | ||
| arsenic | arsenic. | ||
| bismuth | bismuth. | ||
| antimony | antimony. | ||
[Note A: All these combinations were unknown to the ancient chemists.—A.]
Sect. XXXI.—Observations upon Pyro-mucous Acid, and its Combinations.
This acid is obtained by distillation in a naked fire from sugar, and all the saccharine bodies; and, as these substances swell greatly in the fire, it is necessary to leave seven-eighths of the retort empty. It is of a yellow colour, verging to red, and leaves a mark upon the skin, which will not remove but alongst with the epidermis. It may be procured less coloured, by means of a second distillation, and is concentrated by freezing, as is directed for the citric acid. It is chiefly composed of water and oil slightly oxygenated, and is convertible into oxalic and malic acids by farther oxygenation with the nitric acid.
It has been pretended that a large quantity of gas is disengaged during the distillation of this acid, which is not the case if it be conducted slowly, by means of moderate heat.
Table of the Combinations of the Oxalic Acid, with the Salifiable Bases, in the Order of Affinity(A).
| Bases. | Neutral Salts. | ||
| Lime | Oxalat of | lime. | |
| Barytes | barytes. | ||
| Magnesia | magnesia. | ||
| Potash | potash. | ||
| Soda | soda. | ||
| Ammoniac | ammoniac. | ||
| Argill | argill. | ||
| Oxyd of | |||
| zinc | zinc. | ||
| iron | iron. | ||
| manganese | manganese. | ||
| cobalt | cobalt. | ||
| nickel | nickel. | ||
| lead | lead. | ||
| copper | copper. | ||
| bismuth | bismuth. | ||
| antimony | antimony. | ||
| arsenic | arsenic. | ||
| mercury | mercury. | ||
| silver | silver. | ||
| gold | gold. | ||
| platina | platina. | ||
[Note A: All unknown to the ancient chemists.—A.]