Reef. See [Lodes]
Retort for small quantities of amalgam, [142];
and of mercury, [143]
Reverberatory furnaces, [101] et seq.
Right angle, [158]
Rivers, To measure width of, [157], [158]
Robbery in gold-mills, Mode of preventing, [124-126]
Ropes, Durability of, [173];
Qualities of, [190]
Rope-splicing, [166]