=The Senate: Its Concurrent Powers.=—In all other matters, apart from impeachments, appointments, and treaties, the Senate has concurrent power with the House of Representatives. There is a provision in the constitution to the effect that all bills for raising revenue must “originate” in the House of Representatives, but that the Senate may amend such bills as it pleases. This is a partial reproduction of an ancient rule in the unwritten constitution of Great Britain which gives the House of Commons the initiative in all financial matters. By usage, also, all bills for spending money originate in the lower house. But the Senate, as a practical matter, uses its amending power so freely that it can virtually originate measures of either sort whenever it desires to do so. When a bill comes up from the lower chamber it can strike out virtually the whole measure, put a new bill in its place, and send this back to the House of Representatives. In matters which do not relate to revenue or expenditure the powers of the two chambers are precisely the same both in theory and in practice. [Sidenote: How the size of the House is determined.] =The House of Representatives: Its Organization.=—The House of Representatives is nearly five times as large as the Senate, having 435 members at the present time. It is much too large for the effective debating of measures.[113] Every ten years, after the population of each state has been determined by the census bureau, Congress by law fixes the total membership of the House for the ensuing decade. Dividing this figure into the total population of the country gives a “ratio of representation”, that is the uniform quota of population which is entitled to one representative. For example, if the population of the country is one hundred millions and the membership of the House is fixed at 400, the ratio would be one representative for every 250,000 people. Having found this ratio, it is a simple matter to determine how many representatives each state shall have. New York, with ten million people, would be allotted forty congressmen; Maine, with seven hundred and fifty thousand people, would get only three. Nevada, Wyoming and Delaware would not get any, if the ratio were strictly applied, but the constitution requires that every state, no matter what its population, shall be given at least one representative in the House. When the quota to which each state is entitled has been figured the several states proceed, through their legislatures, to lay out congressional districts and from each such district one congressman is chosen at the next election. [Sidenote: Congressional districts.]