land grant colleges bought Alaska from Russia Lincoln believed in the Whig theory of the presidency, which left Congress to write the laws while he signed them, vetoing only those bills that threatened his war powers. Thus, he signed the Homestead Act in 1862, making millions of acres of government-held land in the West available for purchase at very low cost. The Morrill Land-Grant Colleges Act, also signed in 1862, provided government grants for agricultural universities in each state. The Pacific Railway Acts of 1862 and 1864 granted federal support for the construction of the United States’ First Transcontinental Railroad, which was completed in 1869. Other important legislation involved two measures to raise revenues for the Federal government: tariffs (a policy with long precedent), and a Federal income tax (which was new). In 1861, Lincoln signed the second and third Morrill Tariff (the first had become law under James Buchanan). In 1862, Lincoln signed legislation creating the