_Individuals_ may seek and obtain health through the agencies already, and to be, suggested. To keep in health, their _neighbors_ must be induced or compelled to adopt the same course. This is not an absolute law, but manifestly is very essential. Supposing your own house, sidewalk, alley, or yard, are comparatively immaculate, it will be impossible to live without constant danger and exposure if your friend (or enemy in this sense) has an untidy house, a dirty sidewalk, and a filthy yard, in your proximity. Then how encouraging to note that health is as contagious as disease. It even spreads with greater rapidity. Health is gladly welcomed; disease is shunned like a deadly poison. All over the world past and contemporary history proves that, once started, health spreads at a rate that disease cannot follow. What will surely result? Healthful communities will make healthful municipalities; healthful municipalities will end in commonwealths and nations of like character. The whole earth will be leavened. From a record of 34 years as the average _duration_ of human life, the thermometer of universal progress will point to the threescore and ten, or 70 years. If you were induced to smile at the close of the last sentence, it shows that you are not lost to all sense of appreciation--but quietly put on your sober cap for a moment and read a few facts on _vital statistics_. The average length of life up to twenty years ago was 33 years, now it has reached about 34.8 years. This has not been caused by the _whole_ world becoming more healthful--indeed, some portions of the earth, including sections of the United States, have retrograded, and the former limit of _mortality_ has been lowered--but by the health of a number of _organizations_, _sects_, and individuals who have increased their standards of regularity, cleanliness, temperance, morality, and self-control. Thus the average rate of mortality has been raised nearly 2%. An interesting fact which is new to the majority of persons is this, that the whole sect of _Friends_, or _Quakers_, live an average of 58 years per individual. In the thirty-two years from 1850 to 1882 they raised the average six years, or about one year in five. With this ratio, which is itself increasing, the plurality of Quakers will be centenarians in less than two hundred years--in half that time if assisted by the world at large. By the foregoing it will be seen that the whole organization of Friends live 70% longer than the general age allotted to mankind, which includes them to make up the universal rate. Another noticeable feature in connection with the Quakers' life is this, the deaths among them average 18 in every thousand; in the general population, 22 per thousand; while the amount given to charities per inhabitant in that sect is $7.78, and in the total population the average is $1.46. Why this difference in longevity to so marked a degree?