Gold: its occurrence and extraction. Embracing the geographical and geological distribution ... of gold-bearing rocks; ... a bibliography of the subject; and a glossary of English and foreign technical terms ... With ... maps, etc
Alfred George Lock's 1882 technical treatise on gold, published in London by E. & F. N. Spon for mining engineers, assayers and prospectors, covering the distribution of auriferous rocks and the machinery used to work them. The plates are numbered line engravings of ore-dressing equipment — sectional elevations, plans and end views of stamps, sluices, concentrators and percussion tables, with lettered parts, hatched cutaways and fine ruled shading usable as ready-made machine diagrams.
