Chapter II: Section I

Operations performed on Saline Mineral Substances.

CHAP. I. _Of the Vitriolic Acid._

1. PROCESS. To extract Vitriol from the Pyrites 159

2. To extract Sulphur from the Pyrites, and
other Sulphureous Minerals 162

3. To extract Alum from aluminous Minerals 165

4. To extract the Vitriolic Acid from Copperas
or Green Vitriol 170

5. To decompose Sulphur, and extract its Acid, by
burning it 174

6. To concentrate the Vitriolic Acid 176

7. To decompound Vitriolated Tartar by means of the
Phlogiston; or to compose Sulphur by combining the
Vitriolic Acid with the Phlogiston 179

CHAP. II. _Of the Nitrous Acid._

1. PROCESS. To Extract Nitre out of Nitrous Earths
and Stones. The Purification of Salt-Petre. Mother
of Nitre. Magnesia 181

2. To decompose Nitre by means of the Phlogiston.
Nitre fixed by Charcoal. _Clyssus_ of Nitre.
_Sal Polychrestum_ 186

3. To decompose Nitre by means of the Vitriolic Acid.
The Smoking Spirit of Nitre. _Sal de duobus._ The
Purification of Spirit of Nitre 191

CHAP. III. _Of the Marine Acid._

1. PROCESS. To extract Sea-salt from Sea-water, and
from Brine-springs. Epsom Salt 195

2. Experiments concerning the Decomposition of Sea-salt
by means of the Phlogiston. Kunckel's Phosphorus 197

3. To decompose Sea-salt by means of the Vitriolic Acid.
Glauber's Salt. The Purification and Concentration
of Spirit of Salt 211

4. To decompose Sea-salt by means of the Nitrous Acid.
_Aqua regis._ Quadrangular Nitre 217

CHAP. IV. _Of Borax._ 218