COMMONWEALTH 365 latter, and the number of representatives from each State, depend on the population. The House of Representatives can be dissolved at any time by the Executive, nor can it last longer than three years without an election. The Senate is a permanent body, whose members retire in rotation; but if the two Houses disagree, they may both be dissolved, and after a new election a majority vote at a Joint Sitting, in which the Senate .woiild be considerably outnumbered, decides the matter. As has been shown, the powe^rs of the British Hous6 of Lords may be so used as to require an election on an issue disputed between Lords and Commons; the Australian Constitution gives definite expression to this principle of appeal to the people. The two Australian Houses have equal power, except over Money Bills; the Senate can only make recommendations about these; it cannot originate or amend. The Coihmonwealth stretches over an area more than thirty times that of the United Kingdom, yet contains less than seven million people. Migration from Britain, which, from a glance at the map and the figures of British unemployment, seems the obvious policy, is difficult to arrange. Much of the unpeopled space is barren through lack of rainfall, and though it might, at great expense, be made more fit for habitation, it is hard to say what population Australia could, under modern conditions, support. As a producer of wool, she suffered severely from the 1932 slump, and is still suffering from the decline in Japanese purchases of wool following the great military expenditure of that country. Small numbers do not necessarily mean absence of unemployment. The Empire Settlement Act, 1932, led to co-operation between the Mother Country and the States of Australia, as a result of which a limited number of people were enabled to migrate with grants of money and land to help them. In 1936, the Overseas Settlement Board was set up as a Depart- ment of the Dominions Office to consider the whole problem.. If world economic policy can be framed so as to provide greater •security against slump, it may be that migration, both to