Turnbuckles are also used extensively in watercraft and aircraft to regulate the lengths and tensions of riggings and rope and cable lines. In all applications, turnbuckles should be selected to be at least as strong as the cable or rope to which they're secured.
The Wade-Davis Bill of 1864 was created by the Radical Republicans, who believed that absolute punishment had to be levied against the South as a condition of re-admittance during Reconstruction. The bill called for a complete abolition of slavery to prevent it from surviving in any way after the war.
Wilmot introduced a rider to that measure, which was derived from the Northwest Ordinance, barring slavery from any territory acquired from Mexico. The bill containing the Wilmot Proviso passed the House in 1846 but the Senate failed to take any action on it. Passed again by the House in 1847, the proviso was defeated largely by the opposition of Senator John C. Calhoun of South Carolina.