1918 To 1950
The Representation of the People Act 1918 redefined constituency boundaries in relation to local government boundaries of the time, and the new constituency boundaries were first used in the 1918 general election.
Scotland had 32 burgh constituencies, 38 county constituencies and one university constituency. One burgh constituency, Dundee, represented seats for two MPs, and the university constituency, Combined Scottish Universities, represented seats for three MPs. Each of the others elected one MP. Therefore, the legislation provided parliamentary seats for a total of 74 Scottish MPs.
1918 boundaries were used also in the general elections of 1922, 1923, 1924, 1929, 1931, 1935 and 1945.
Read more about this topic: Scottish Westminster Constituencies