PRINCIPLES OF MINING

PRINCIPLES OF MINING

VALUATION, ORGANIZATION AND ADMINISTRATION

COPPER, GOLD, LEAD, SILVER, TIN AND ZINC

BY
HERBERT C. HOOVER

Member American Institute of Mining Engineers, Mining andMetallurgical Society of America, Société desIngénieurs Civils de France, Fellow Royal Geographical Society,etc.

First Edition
FOURTH THOUSAND

McGRAW-HILL BOOK COMPANY
239 WEST 39TH STREET, NEW YORK
BOUVERIE STREET, LONDON, E.C.
1909

Page iiiPREFACE.

This volume is a condensation of a series of lectures deliveredin part at Stanford and in part at Columbia Universities. It isintended neither for those wholly ignorant of mining, nor for thoselong experienced in the profession.

The bulk of the material presented is the common heritage of theprofession, and if any one may think there is insufficient referenceto previous writers, let him endeavor to find to whom the originof our methods should be credited. The science has grown by smallcontributions of experience since, or before, those unnamed Egyptianengineers, whose works prove their knowledge of many fundamentalsof mine engineering six thousand eight hundred years ago. If Ihave contributed one sentence to the accumulated knowledge of athousand generations of engineers, or have thrown one new ray oflight on the work, I shall have done my share.

I therefore must acknowledge my obligations to all those who havegone before, to all that has been written that I have read, tothose engineers with whom I have been associated for many years,and in particular to many friends for kindly reply to inquiry uponpoints herein discussed.

Page vCONTENTS.