Spelter, annual demand, [38].

Square-set, [103], [104].

-set timbering, [104].

Stations, [84].

arrangement for skip haulage in vertical shaft, [85], [87].

Steam-pumps, direct, [140].

Steepening winzes and ore passes, [111].

Stope filled with broken ore, [113].

minimum width, [101].

Stoping, [89], [94].