statistical summary 1998 2 1 s t a tistical ummar y by stephen d smith this annual report summarizes data on crude nonfuel mineral production for the united states its island possessions and commonwealth of puerto rico although may be measured at any several stages extraction processing stage measurement used in is what termed mine output term refers to minerals or ores form which they are first extracted from ground but customarily include auxiliary near mines because inadequacies statistics available some series deviate foregoing definition copper gold lead silver tin zinc quantities shown recorded basis as recoverable content ore sold treated values assigned however based average selling price refined metal not value mercury recovered valued new york current dollars with no adjustments made compensate changes purchasing power
