...are less accurate in total quantity of copper recovered ; the smelter figures permit of reasonable accurate distribution and also furnish the actual...during the year ; the refinery figures furnish the best measure of the copper made available for commercial uses during the year, but at this stage of manufacture...

...production, but are less accurate in total quantity of copper recovered: the smelter figures permit of reasonably accurate distribution and also furnish...during the year; the refinery figures furnish the best measure of the copper made available for commercial uses during the year, but at this stage of manufacture...

...production, but are less accurate in total quantity of copper recovered; the smelter figures permit of reasonably accurate distribution and also furnish...during the year; the refinery figures furnish the best measure of the copper made available for commercial uses during the year, but at this stage of manufacture...

...production but are less accurate in total quantity of copper recovered; the smelter figures permit of reasonably accurate distribution and also furnish...from foreign sources, is uncertain. Statistics for 1915 showing the production of each of these stages of manufacture have been collected by the United...

...production but are less accurate in total quantity of copper recovered; the smelter figures permit of reasonably accurate distribution and also furnish...the best measures of the copper made available for commerical uses during the year, but at this stage of manufacture the accurate distribution to the...

...refining. The Lake Superior native-copper district is the only important producing region where these three processes are not entirely distinct. It is possible,...from foreign sources, is uncertain. Statistics for 1917 showing the production of each of these stages of manufacture have been collected by the United...