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PART IV.—THE BITUMINOUS COAL MINING INDUSTRY IN THE

SOUTHWEST.

CHAPTER I.

INTRODUCTION.

Households studied-Members of households for whom detailed information was secured-Employees for whom information was secured-[Text Tables 384 to 388 and General Tables 150 to 152].

HOUSEHOLDS STUDIED.

The investigation in the Southwest included the coal-producing areas of Kansas and Oklahoma." In addition to the historical and descriptive matter collected, information was received for 7,036 mine workers, and in the States mentioned above an intensive study was made of 476 households the heads of which were employed in the bituminous mines.

The following table shows, by general nativity and race of head of household, the number and percentage of households studied in the bituminous mining localities of the Southwest, and the percentage each race forms of the total number studied.

TABLE 384.-Households studied, by general nativity and race of head of household.

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The largest proportions of households of foreign races studied in the Southwest, as can be seen from the above table, were those whose heads were North Italians and Slovaks, the selection being made according to the numerical importance of these two races. The same basis of selection was adopted in studying the households of the other six races whose heads were of foreign birth. The households whose heads were white persons or negroes, of native birth and native father, were studied for the purpose of making comparisons with immigrant households.

a See Volume I, chapter I, p. 5 et seq.

MEMBERS OF HOUSEHOLDS FOR WHOM DETAILED INFORMATION WAS SECURED.

The table next submitted shows, by general nativity and race of head of household, the total number of persons and the persons for whom detailed information was received, in the households studied.

TABLE 385.-Persons in households studied and persons for whom detailed information was secured, by general nativity and race of head of household.

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The number of persons of each sex living in the households studied is also shown, by general nativity and race of head of household, in the following table:

TABLE 386.—Sex of persons for whom detailed information was secured, by general nativity and race of head of household.

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The persons for whom detailed information was secured are next tabulated according to general nativity and race of individual instead of head of household.

TABLE 387.-Persons for whom detailed information was secured, by sex and general nativity and race of individual.

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EMPLOYEES FOR WHOM INFORMATION WAS SECURED.

The following table shows the per cent distribution, by general nativity and race, of the male employees from whom detailed infor

mation was secured:

TABLE 388.—Male employees for whom information was secured, by general nativity and race.

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Number of male employees for whom detailed information was secured, by general nativity and race. (This chart shows only races represented by 50 or more employees.]

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