In 1830, the southern provinces declared their independence in the Belgian Revolution, to become Belgium.
[1] After the Treaty of London in 1839, the Dutch government recognised the separation of Belgium, and became the Kingdom of the Netherlands.
In 1840 the constitution was changed; all southern provinces except the eastern half of the province of Limburg (with three representatives) had left the Kingdom of the Netherlands, so the size of the House of Representatives was fixed at 58 members.
Members served a four-year term, with half of the seats up for election every two years.
[3] For the 1918 election, the constitution was changed: the districts system was abandoned, and proportional representation was used.