TABLE 4.-Persons for whom detailed information was secured, by sex and general nativity and race of individual-Continued.

The following table shows the number and percentage of male employees of each race for whom information was secured in the Tennessee copper-mining district:

TABLE 5.-Male employees of each race for whom information was secured, Tennessee copper-mining district.

The following table and charts show the number and percentage of male employees of each race for whom information was secured:

TABLE 6. Male employees for whom information was secured, by general nativity and

THE PREPARATION OF THE REPORT.

In preparing the data collected for publication two general divisions have been observed, as follows:

Part I. General survey of the industry.

Part II. Study of the industry in Michigan.

The tabulations which appear in Part II are based upon the information secured for employees; those for Part I include both employees and households. Four separate tabulations for the Tennessee mining employees have also been made and appear in Part I.