Title: Principles of mining
First published: 1909
Description: Hoover's first book.  Wildly successful, often reprinted, and still available.  
"True" First Edition (in my observation) has: "Hill Publishing Company" (soon to become McGraw Hill) on the spine and title page; no reference to "edition" or subsequent printings, impressions, or thousands; and most interesting, in the second line of the PREFACE, "Stamford" instead of "Stanford" (Columbia is spelled properly).  The copies I've seen have a pencil line through the "m" of "Stamford" -- perhaps an informal correction after printing.  There could be, of course, other typos.  
Pages vii and 1-199 numbered. Issued, I think, without dust-jacket.  
Stanford, Cornell Engineering, Harvard, LOC. and perhaps others have "True" First Editions; others are mostly later.  HathiTrust and Gutenberg have 14 digitizations but only 2 "True" First Editions (Cornell and Harvard).
Subjects: Mines and mineral resources, Mineral industries, Finance, Mining engineering, Mine management, Mine valuation
LC classification: TN145 .H7