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Foreword 
 J This edition of the MiAerals Yearbook, covering calendar year 1967, marks
the 86th year in which the Federal Government has issued, on an 
annual basis, a report on the U.S. mineral industry. In response to the desires
of our readership, this 1967 edition has returned essentially to the Yearbook
format in use prior to 1966, with some minor modifications. The general content
of this edition follows: 
 Volume I—Il, Metals, Minerals, and Fuels, contains all the chapters
on the metal, nonmetal, and mineral fuel commodities that previously appeared
in the separate Volume I, Metals and Minerals, and Volume Ii, Mineral Fuels.
In addition, it includes a chapter reviewing these minerai industries, a
statistical summary, and chapters on employment and injuries, and technologic
trends. As in Yearbooks prior to 1966, text accompanies the statistical presentation.
Some of the longer chapters have been redesigned so that the tabular presentation
follows the text, rather than being interspersed throughout the text as in
the past. 
 Volume III, Area Reports: Domestic, contains chapters covering each of the
50 States, the U.S. island possessions in the Pacific Ocean and the Caribbean
Sea, the Commonwealth of Puerto Rico, and the Canal Zone. Volume III also
has a statistical summary chapter, identical with that in Volume I—TI,
and a chapter on employment and injuries. 
 Volume IV, Area Reports: International, which was not published in 1966,
has been reinstated. This volume contains 85 chapters presenting the latest
available mineral statistics for more than 130 foreign countries and areas,
and discusses the importance of minerals to the economies of these nations.
A separate chapter reviews minerals in the world economy. 
 The continuous effort of the Bureau of Mines to enhance the value of the
Yearbook for its readership can be aided by comments and suggestions from
its users; such comments are invited. 
 
 
JOHN F. O'LEARY, Director