Reprint of the original, first published in 1876.

Reprint of the original, first published in 1876.

This technical guide offers a detailed exploration of the Hunt and Douglas process for extracting copper. With comprehensive notes and data, this book will be a

The Hunt and Douglas Process for Extracting Copper from its Ores. - With an Appendix Including Notes on the Treatment of Silver and Gold Ores is an unchanged, h