Size of deposit, [30].

Skill, effect on production cost, [163].

Skips, [77], [84], [132].

balanced, [129].

haulage in vertical shaft, [85].

Sollars, [109].

Solubility of minerals, [27].

Specific volume of ores, [14].

Speculative values of metal mine, [1].

value of mine, [57].