Description

The modified schedule used to enumerate American Indians in 1910 contained a section labeled "Proportion of Indian and other blood," with individual fields labeled "Indian," "White," and "Negro." Enumerator instructions stated "If the Indian is full-blood, write 'full' in column 36, and leave columns 37 and 38 blank. If the Indian is of mixed blood, write in columns 36, 37, and 38 the fractions which show the proportions of Indian and other blood, as (column 36, Indian) 1/2, (column 37, white) 1/2, and (column 38, negro) 0. For Indians of mixed blood all three columns should be filled, and the sum, in each case, should equal 1, as 1/2, 0, 1/4, 3/4, 0, 1/8, etc."

Enumerators entered a wide variety of fractions in response to this question. We converted the fractions to a percentage, with the last digit being an implied decimal. Thus 3/8 = 375 (i.e., 37.5). Values of BLOODB range from 0 (no white blood) to 1000 (presumably meaning all “Negro” blood).

Users should note that these entries were not always consistent with the individual's recorded race, and as such this information is not used when constructing RACE codes.

See also BLOODI and BLOODW for the percentage of American Indian and White blood.

BLOODB is a 4-digit numeric variable used on the modified schedule for American Indians in the 1910 Census by the enumerator to report the American Indian's "percentage of Negro blood" (See also BLOODI and BLOODW for the percentage of American Indian and White blood). BLOODB has one implied decimal. For example, a BLOODB value of 0227 should be interpreted as 22.7. BLOODB specific variable codes for missing, edited, or unidentified observations, observations not applicable (N/A), observations not in universe (NIU), top and bottom value coding, etc. are provided below if applicable by Census year (and data sample if specified).

BLOODB Specific Variable Codes
0000 = Not applicable or 0% Black blood.
9999 = Not classifiable or blank.

Comparability

Universe

Availability

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• 1910: 1%; 1.4% ovrsmp
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Flags

Editing Procedure

There is no editing procedure available for this variable.