The self-governing colonies of the British Empire are not, it is true, states within the meaning of international law, for Great Britain has, among other things, the legal right to conclude with other nations treaties which affect her colonies. It is, moreover, too much to say that the self-governing colonies will become members of the family of nations. Still it is a fact that England has in recent years granted them more or less participation in the negotiation of treaties affecting their welfare; and in a recent treaty of general arbitration Great Britain expressly reserves “the right before concluding a special agreement in any matter affecting the interest of a self-governing Dominion of the British Empire, to obtain the concurrence therein of the Government of that Dominion.” Consequently these colonies possess a certain standing in international relations which can not be overlooked, and which justifies some comparative study of their fundamental laws. The object of this paper is, therefore, to give a general sketch of the constitution of South Africa, recently approved by the English Parliament, in the light of the earlier constitutions similarly granted to Canada and Australia.