[59] Cupreous pyrites and cupreous iron pyrites, besides which a considerable quantity of copper precipitate is produced.
[60] A small quantity of copper ore is produced in Finland, but the bulk of the Russian production is in the Asiatic provinces.
[61] Mainly cupreous iron pyrites.
[62] Argentiferous.
[63] In 1906 Greece produced 12,308 m.t. of argentiferous pig lead.
[64] Of which 158,424 m.t. argentiferous.
[65] A considerable quantity of manganese ore is produced in the government of Ekaterinoslav, but the main seat of Russian production is the Caucasus.
[66] Zinc and lead ore.
[67] In addition to 28,891 m.t. of calcined zinc ore.
[68] Probably the most complete synopsis of the evidence on this point is to be found in Prince Kropotkin’s Fields, Factories and Workshops (London, 1899).