Set the ratio to one member of Congress for every 70,680 residents. Decreased the size of the House of Representatives to 223 seats. The Webster method of apportionment was used. The act also required, for the first time, that states be split into congressional districts according to their apportionment, and that a single representative be elected from each district.

Set the size of the House of Representatives at 233 seats. Directed the secretary of the interior to use the Hamilton/Vinton method to apportion those 233 seats among the states.

Ordained that California's House delegation should be two seats (the state could not be effectively included in the regular apportionment, because some of its census returns had been destroyed in a fire). Increased the size of the House of Representatives to 234 seats in order to accommodate this amendment. Additionally, 234 seats is the House size at which the Webster and Hamilton/Vinton methods agree on apportionment.

Increased the size of the House of Representatives to 241 seats. Pennsylvania, Ohio, Kentucky, Illinois, Iowa, Minnesota, Vermont, and Rhode Island were each awarded an additional seat.

Increased the size of the House of Representatives to 283 seats that were apportioned using the Webster and the Hamilton/Vinton methods, which agree at this chamber size.

Awarded one additional House seat each New Hampshire, Vermont, New York, Pennsylvania, Indiana, Tennessee, Louisiana, Alabama, and Florida.

Increased the size of the House of Representatives to 325 seats, which is again the chamber size at which the Webster and Hamilton/Vinton methods agree.