SECTION II.. Of Operations on Minerals.

Of Operations on Minerals.

CHAP. I. Of Gold.

1. PROCESS. To separate Gold, by Amalgamation with Mercury, from the Earths and Stones with which it is found mixed 223

2. To dissolve Gold in Aqua Regis, and by that means separate it from Silver. Aurum Fulminans. Aurum Fulminans reduced 227

3. To dissolve Gold by Liver of Sulphur 232

4. To separate Gold from all other Metalline substances by means of Antimony 233

CHAP. II. Of Silver.

1. PROCESS. To separate Silver from its Ore, by means of Scorification with Lead 238

2. The refining of Silver by the Cupel 243

3. To purify Silver by Nitre 248

4. To dissolve Silver in Aqua Fortis, and thereby separate it from every other Metalline substance. The Purification of Aqua Fortis. Silver precipitated by Copper 250

5. To separate Silver from the Nitrous Acid by Distillation. Crystals of Silver. The Infernal Stone 254

6. To separate Silver from the Nitrous Acid by Precipitation. Luna Cornea. Luna Cornea reduced 256

7. To dissolve Silver, and separate it from Gold, by Cementation 258

CHAP. III. Of Copper.

1. PROCESS. To separate Copper from its Ore 262

2. To purify Black Copper, and render it malleable 264

3. To deprive Copper of its Phlogiston by Calcination 266

4. To resuscitate the Calx of Copper, and reduce it to Metal, by restoring its Phlogiston 267

5. To dissolve Copper in the Mineral Acids 268

CHAP. IV. Of Iron.

1. PROCESS. To separate Iron from its Ore 270

2. To render Pig-iron and brittle Iron malleable 273

3. To convert Iron into Steel 274

4. The Calcination of Iron. Sundry Saffrons of Mars 276

5. Iron dissolved by the mineral Acids 277

CHAP V. Of Tin.

1. PROCESS. To extract Tin from its Ore 279

2. The Calcination of Tin 280

3. The Dissolution of Tin by Acids 284

CHAP. VI. Of Lead.

1. PROCESS. To extract Lead from its Ore 286

2. To separate Lead from Copper 289

3. The Calcination of Lead 292

4. To prepare Glass of Lead 293

5. Lead dissolved by the Nitrous Acid 295

CHAP. VII. Of Mercury.

1. PROCESS. To extract Mercury from its Ore, or to revivify it from Cinabar 298

2. To give Mercury, by the action of Fire, the appearance of a Metalline Calx 301

3. To dissolve Mercury in the Vitriolic Acid. Turbith Mineral 302

4. To combine Mercury with Sulphur. Æthiop's Mineral 304

5. To sublime the Combination of Mercury and Sulphur into Cinabar 306

6. To dissolve Mercury in the Nitrous Acid. Sundry Mercurial Precipitates 307

7. To combine Mercury with the Acid of Sea-salt. Corrosive Sublimate 308

8. Sweet Sublimate 312

9. The Panacea of Mercury 314