carbide, 87, 92.

Extraction of, 78, 82.
Barker's process (gold), 265.
Basse-selve process (Nickel), 398.
Battery, Theory of, 5.
Bauxite, 101.

Beatson process (tin-plate), 320.
Becquerel process (silver-lead), 241,
331.

Beketoff process (aluminium), 103.
Benardos process (electric welding),
386, 387.

Berg process (aluminium), 129.
Bernard process (aluminium), 152.
Berthaut process (aluminium), 123.
(magnesium), 19.
Bertram process (aluminium), 116.
Beryllium, 40.

Bessemer process (copper), 174.

(iron), 380.

Refining,

Asbestos, 17.

Ashcroft process (zinc), 307.
Atkins' process (gold), 269.
(sodium alloys), 67.

Augustin process (silver), 239.

(antimony), 348.

(chromium), 366.

(lead), 339.

(magnesium), 27, 28.

(silver), 253.

(sodium), 57, 60, 64.

(sodium alloys), 72.

(zinc), 299, 312.