Pumps.
page
Suction.................................... 175—188
Purgato* argenti (see Silver Refiner).
Purser ..................................... 77
Puteoli..................................... 501
Pyrargyrite.............................. 109
Pyriten argentum.......................... 408
Pyrites {see also Cakes of Melted
Pyrites)................. 51; 111; 112; 1
As a flux................................. 234
Assay for gold.......................... 243
In tin concentrates.................... 348
Latin and German terms............ 222
Roasting ................................. 273—274
Roasting cakes of ..................... 349—351
Smelting for gold and silver........ 399 ; 401
Used in making vitriol............... 678
Pyrites aerosus (see Copper Pyrites).
Pyrites aurei coloris (see Copper
Pyrites).
Quartz (see also Stones which easily
melt)................................. 114
As a flux................................. 380
An indication of ore.................. 116
Material of glass........................ 380
Silver ore ................................ 113
Smelting of.............................. 401
Quarzum (see Quartz).
QUERTZE i................................... 380
Quicksilver.................. 432; 2; 354; 111
Amalgamation of gilt objects ...... 461
Amalgamation of gold dust......... 396
Amalgamation of gold ores......... 297 ; 297
Assaying methods..................... 247
Ore........................................ 426—432
Use in assaying gold ore ............ 243
Rag and Chain Pumps................. 188—200
Rake Veins ............................... 101
Rammelsberg.
Collapse of mines ..................... 216
Discovery................................ 37
Early vitriol making.................. 672
Rauchstein ................................. 127
Realgar .............................. 1; 111; 222
Colour of fumes........................ 235
Harmful to metals .................... 273
Indication of ore....................... 116
Roasted from ore....................... 273
Rederstein (see Trochitis).
Red-lead ........................ 232; 110; 222
Use in parting gold from copper ... 463
Use in parting gold from silver...... 459
Refined Salt.................... 454; 463; 233
Refinery for Silver and Copper 491—498
Refining Gold from Copper ...... 462—464
Refining Gold from Silver ........ 443—458
Refining-hearth........................ 492
Refining Silver......... 483—490; 465; 484
Refining Silver from Lead ........ 464
Reformation, The ..................... V; VIII.
Re-opening of Old Mines ........... 217
Revival of Learning.
Agricola's position in................. XIII.
Reward Lease, in Australian Law 77
Rhaetia .................................... 388
Rhaetian Alps.
Stamp milling in....................... 319
Ring-fire.................................. 448
Rio Tinto Mines.
Roman methods of smelting........ 405
Roman water-wheels ................. 149
Risks of Mining ........................ 28—29
Rither (a horse) ......................... 101
Roasted Copper ............... 233; 233; 222
Roasting.......................... 273—279; 267
Heap roasting.......................... 274—275
In furnaces.............................. 27β
-Mattes.................................... 349—351
Prior to assaying ..................... 231
Rocks....................................... 119; 2
Rock-salt ..... ........................... 648; 222
Use in cementation................... 454
Roman Alum.............................. 666
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