metal, value of, [1].

of moderate depths, [62].

to be worked to great depths, [62], [69].

valuation, [1], [13], [21], [34], [42], [51].

Mining engineering profession, [185].

Mt. Cenis tunnel, [145].

Morgan gold mine, [26].

Normal price, [36], [37].

Obligations of engineering profession, [192].

Openings, position in relation to secondary alteration, [23], [25].