Finally, the colonies have made momentous experiments in federation. New Zealand's was the earliest and the briefest; after a few years' experience of provincial governments between 1852 and 1870, it reduced its provincial parliaments to the level of county councils, and adopted a unitary constitution. In Canada, on the other hand, the union of the Upper and Lower Provinces proved unworkable owing to racial differences; and in 1867 the federation called the Dominion of Canada was formed by agreement between Upper and Lower Canada (henceforth called Ontario and Quebec), New Brunswick, and Nova Scotia. Prince Edward Island and British Columbia joined soon afterwards; and fresh provinces have since been created out of the Hudson Bay and North-west Territories; Newfoundland alone has stood aloof. Considerable powers are allotted to the provinces, including education; but the distinguishing feature of this federation is that all powers not definitely assigned by the Dominion Act to the provinces belong to the Dominion. This is in sharp contrast to the United States, where each individual state is the sovereign body, and the Federal government only possesses such powers as the states have delegated to it by the constitution. In this respect the Australian federation called the Commonwealth, which was formed in 1900, resembles the United States rather than Canada. The circumstance that each Australian colony grew up round a seaport, having little or no overland connexion with other Australian colonies, kept them long apart; and the commercial interests centred in these ports are still centrifugal rather than centripetal in sentiment. Hence powers, not specifically assigned to the Federal government, remain in the hands of the individual states; the Labour party, however, inclines towards a centralizing policy, and the general trend seems to be in that direction. It will probably be strengthened by the construction of transcontinental railways and by a further growth of the nationalist feeling of Australia, which is already marked. The Union of South Africa, formed in 1909, soon after the Boer colonies had received self-government, went almost as far towards unification as New Zealand, and became a unitary state rather than a federation. The greater expense of maintaining several local parliaments as well as a central legislature, and the difficulty of apportioning their powers, determined South African statesmen to sweep away the old legislatures altogether, and to establish a united parliament which meets at Cape Town, a single executive which has its offices at Pretoria, and a judicature which is located at Bloemfontein. Thus almost every variety of Union and Home Rule exists within the empire, and arguments from analogy are provided for both the British political parties.