(Feb. 8, 1887), U.S. law providing for the distribution of Indian reservation land among individual tribesmen, with the aim of creating responsible farmers in the white man's image. It was sponsored in several sessions of Congress by Sen. Henry L. Dawes of Massachusetts and finally was enacted in February 1887. Under its terms, the president determined the suitability of the recipients and issued the grants, usually by a formula of 160 acres to each head of household and 80 acres to each unmarried adult, with the stipulation that no grantee could alienate his land for 25 years. The Indians who thus received land became U.S. citizens, subject to federal, state, and local laws. The original supporters of the act were genuinely interested in the welfare of the Indians, but there were not enough votes in Congress to pass it until it was amended to provide that any land remaining after the allotment to the Indians would be available for public sale. The combined influence of friends of the Indians and land speculators assured passage of the act.