We need to concern ourselves particularly with the character of our public water supply, air supply and food supply, the number of bacteria in milk, the fitness for human consumption of the meat, fowl, fish, and shell-fish sold in the public markets, and the use of adulterants and preservatives in canned and bottled goods. [Sidenote: Quacks and Quackery] Quacks and quackery should be vigorously fought by laymen as well as physicians. Quacks live by lying and misleading advertisements. Every one should cooperate to encourage the movement by which newspapers and magazines are giving up quack and immoral advertisements and the advertisements of alcoholic beverages. Especially should we refuse to patronize the quack advertiser. When no one is deceived by him, he will cease to advertise. A more immediate method is to change from the newspaper containing such advertising to one which does not. We should also appeal to the editors to reform their advertising, as many of them are now doing. [Sidenote: Vaccination] Vaccination is now a known preventive against smallpox, typhoid fever, and other germ maladies. Its use should be advocated and the ignorant prejudice against it should be overcome. [Sidenote: Social Evil] Last but not least, the individual should cooperate in the great movement against the social evil. As soon as an individual becomes interested in caring for his own health and for the health of his family, his interest will not cease at individual hygiene; he will wish to improve the efficiency of the public health service by increased appropriations, improved equipment and personnel; and to cooperate with the health officer. [Sidenote: Eugenics]