J>ASE

Poling,  -    306

Polybasite,  -    203

Polvmorphism,  49

Ponsard,      -        -        89,154,163
Furnace,      164,  192, 195
Pontgibaud  Method,    -        -    284
Potassium,  38

„          Cyanide,   -       -      74
Pot  Roasting,      -  -    290

Potosi  Silver,  -      62

Pouillet,  -  -  -  21,  98
Pourcel,  -  -  -  -  197
Precipitating  Vat,  -  -  254
Prince's  Metal,  59

Printers'  Blue,  -  -  -  346
Producer  Gas,  -  -  -  114
Proustite,  -  203

Puddled    Iron,    Treatment

of, 160

Puddlers'  Ore,     -        -        -    116

Puddling,    -        -        -     156,157

„         for  Steel,     -        -    175

,,         Furnace,      •     157, 158

Bed  of,  -    157

„  „        Banks',  -    158

Grate  of,    157
„         Furnace,   Labora-
tory of,     -        -     157
„         Furnace,  Lining  of,  157
„  „         Pernot's,    158

,,  Gas  Furnaces  for,  159
Mechanical,  -  158
Slag,  -  158

Wet,  -  -  -  157
PulJinger,  -  -  -  319,320
Purple  of  Cassius,  -  -  239
Putty  Powder,  -  -  333

Pyrargyrite,  -  -  -  203
Pvrites,  Copper,  -  -  -  295
Pyritic  Smelting,  236,  257,  309
Pyrolusite,  -  36

Pyromorphite,  ...  203
Pyrometer,  94

„         Cornu-Le  Chate-

lier,       -        -      97
Gauntlett's,       -      94
„         Le  Cha telier,    96, 171
„         Mesure     and

Noel,       -        -      79

,,         Siemens'  96

,,         Thermo-Electric,      96

"Wedgwood's,     -      94

Pyrometry,  94


Q

Quagleo  and  Lentz,
Quartz,

„       Gold,      -
Quicksilver,

„  Horn,

R

Rabbling,     -
Rachette,     -

„       Furnace,
Raw  Matt,  -

,,    Smelting,
Realgar,
Recalescence,
Red  Haematite,    -

,,    Lead,  -

„    Ochre, -

,,    short,    -

„    Zinc  Ore.
