The primary and immediate purpose of the Committee’s work is to promote the idea of a national Bureau of Health; but the field open to the committee includes the whole subject of public sanitation and hygiene. President Roosevelt has formally endorsed the work, in a letter from which the following is an extract: “Our national health is physically our greatest national asset. To prevent any possible deterioration of the American stock should be a national ambition. We cannot too strongly insist on the necessity of proper ideals for the family, for simple life and for those habits and tastes which produce vigor and make more capable of strenuous service to our country. The preservation of national vigor should be a matter of patriotism.... Federal activity in these matters has already developed greatly, until it now includes quarantine, meat inspection, pure food administration, and federal investigation of the conditions of child labor. It is my hope that these important activities may be still further developed.” And in his notable message to the country, rather than to Congress, which he issued in December, 1907, President Roosevelt wrote: “There is a constantly growing interest in this country in the question of public health. At least, the public mind is awake to the fact that many diseases, notably tuberculosis, are national scourges. The work of the State and City Boards of Health should be supplemented by the constantly increasing interest on the part of the national government. The Congress has already provided a Bureau of Public Health, and has provided for an hygienic report. There are other valuable laws relating to the public health connected with the various departments. This whole branch of the government should be strengthened and aided in every way.” As somebody said before, these things are no more true because a President has said them; but the fact that President Roosevelt has said them, has given wide publicity to them, and impressed them upon the public consciousness. The knowledge that economic conditions;—the way in which men and women live because they have to so live in order to earn a living, is the fundamental factor in the case of public health, is something that is bound to become recognized as the growth of knowledge goes on. It will only be a question of time before men and women will see that in order to have health, it will be necessary to organize all the affairs of life with a view to the well-being of humanity as a whole.