Note 12 — XV
Reading edition
Unsuccessful copper-mining.Very considerable beds of copper ore occur in Mancayán, in the district of Lepanto, and in the central mountain-range of Luzon between Cagayán and Ilocos, which have been worked by a mining company in Manila since 1850; but the operations seem to have been most unsuccessful. In 1867 the society expended a considerable capital in the erection of smelting furnaces and hydraulic machinery; but until a very recent date, owing to local difficulties, particularly the want of roads, it has not produced any copper.12