SECTION III.. Of Operations on the Semi-Metals.

Of Operations on the Semi-Metals.

CHAP. I. Of Antimony.

1. PROCESS. To separate Antimony from its Ore 315

2. The common Regulus of Antimony 316

3. Regulus of Antimony precipitated by Metals 318

4. The Calcination of Antimony 321

5. Calx of Antimony reduced to a Regulus 323

6. Antimony calcined with Nitre. Liver of Antimony. Crocus Metallorum 325

7. Another Calcination of Antimony with Nitre. Diaphoretic Antimony. Materia Perlata. Clyssus of Antimony 326

8. Calx of Antimony vitrified 330

9. Kermes Mineral 331

10. Regulus of Antimony dissolved in the Mineral Acids 335

11. Regulus of Antimony combined with the Acid of Sea-salt Butter of Antimony. Cinabar of Antimony 338

12. Butter of Antimony decompounded by means of Water only. Pulvis Algaroth, or Mercurius Vitæ. The Philosophic Spirit of Vitriol 342

13. Bezoar Mineral. The Bezoartic Spirit of Nitre 343

14. Flowers of Antimony 347

15. Regulus of Antimony converted into Flowers 348

CHAP. II. Of Bismuth.

1. PROCESS. To extract Bismuth from its Ore 350

2. Bismuth dissolved by Acids. Magistery of Bismuth. Sympathetic Ink 352

CHAP. III. Of Zinc.

1. PROCESS. To extract Zinc from its Ore, or Calamine 357

2. To sublime Zinc into Flowers 359

3. To combine Zinc with Copper. Brass. Prince's Metal, &c. 361

4. Zinc dissolved in the Mineral Acids 365

CHAP. IV. Of Arsenic.

1. PROCESS. To extract Arsenic from its matrix. Zafre or Smalt 367

2. To separate Arsenic from Sulphur 371

3. To give Arsenic the Metalline Form. Regulus of Arsenic 374

4. To distil the Nitrous Acid by the interposition of Arsenic. Blue Aqua Fortis. A new Neutral Salt of Arsenic 377

5. To alkalizate Nitre by Arsenic 379