Ergebnisse zu
Bergbau

An Introduction to Microscopic Petrography, With Description of All Minerals Whose Optical Elements Are Known and Tables Arranged for Their..

Text-Book for Schools and Colleges and for General Reference

A Comprehensive Treatise On The Origin And Occurrence Of Gold-bearing Gravels, Rocks, And Ores, And The Methods By Which The Gold Is Extracted

Or, Practical Directions to Assayers

A Practical Treatise On the Amalgamation, Roasting and Lixiviation of Silver Ores Including the Assaying, Melting and Refining of Silver Bullion

An Introduction to the Study of Physical Metallurgy

With Some Notes On Lead Mining