If the historian Lecky was right in saying that the greatest triumphs of the nineteenth century were its sanitary achievements, the Lecky of the twenty-first century will probably honor our generation not for its electricity, its trusts, and its scientific research, but for its crusade against the white plague and for its recognition of health rights. Thanks to committees for the prevention of tuberculosis,--local, state, national, international,--we are fast approaching the time when every parent, teacher, employer, landlord, worker, will see in tuberculosis a personal enemy,--a menace to his fireside, his income, and his freedom. Just as this nation could not exist half slave, half free, we of one mind now affirm that equal opportunity cannot exist where one death in ten is from a single preventable disease.[13] Of no obstacle to efficient living is it more true than of tuberculosis, that the remedy depends upon enforcing rather than upon making law, upon practice rather than upon precept, upon health habits rather than upon medical remedies, upon cooeperation of lay citizens rather than upon medical science or isolated individual effort. Without learning another fact about tuberculosis, we can stamp it out if we will but apply, and see that officers of health apply, lessons of cleanliness and natural living already known to us. [Illustration: DR. TRUDEAU'S "LITTLE RED COTTAGE" AT SARANAC--BIRTHPLACE OF OUT-OF-DOOR TREATMENT IN AMERICA] Perhaps the most striking results yet obtained in combating tuberculosis are those of the Massachusetts General Hospital in Boston. To visit its tuberculosis classes reminds one more of the sociable than the clinic. In fact, one wonders whether the milk diet and the rest cure or the effervescing optimism and good cheer of the physicians and nurses should be credited with the marvelous cures. The first part of the hour is given to writing on the blackboard the number of hours that the class members spent out of doors the preceding week. So great was the rivalry for first place that the nurse protested that a certain boy in the front row gave himself indigestion by trying to eat his meals in ten or fifteen minutes. It was then suggested that twenty hours a day would be enough for any one to stay out of doors, and that plenty of time should be taken for meals with the family and for cold baths, keeping clean, etc. Interesting facts gathered by personal interviews of two physicians with individual patients are explained to the whole class. Next to the number of hours out of doors, the most interesting fact is the number of hours of exercise permitted. A man of forty, the head of a family, beamed like a school child when told that, after nearly a year of absolute rest, he might during the next week exercise ten minutes a day. A graduate drops in, the very picture of health, weighing two hundred pounds. An apparently hopeless case would brighten