Interesting lot of 2 books on the mining of gold (in South Africa).

8vo & 4to, publ. bindings (bindings a bit loose).

Clean set.

1. Eissler, M. - The metallurgy of gold. A practical treatise on the metallurgical treatment of gold-bearing ores [4th enl. ed.]. London, Crosby, Lockwood & Son, 1896. 8vo. Red shagreen. 4th edition with +/- 250 b/w ill. and numerous folding pl. - 2. Letcher, O. - The gold mines of Southern Africa. The history, technology and statistics of the gold industry [...]. Together with a survey of other gold fields in Africa from the Cape to the Nile and in the African Islands. London, the author & Waterlow & Sons, 1936. 4to. Green shagreen. 1st ed. Ill. with many b/w ill., some folding.
Joined: "Kaart van Zuid-Afrika, waarop voorkomen: de beyde Republieken en het geheele Engelsche gebied tot Rhodesia." Printed map of South Africa on paper as part of the Dutch "Meierijsche Courant", 14/04/1900, 54 x 35 cm (folded, edges sl. frayed). Interesting map meant to illustrate the battlefield of the Second Boer War. (3 vol.)