... age of 45, and is caused chiefly by the increase of cancer, and of degenerative diseases of the heart, blood vessels, and kidneys. Degeneration of tissues is normally a condition typical of old ... examinations of the employees of whole institutions, large banks and otherindustrial concerns in New York City, and we find almost the same conditions there. Out of 2000 suchexaminations among young ... possible to consider here a few only of the many environmental and personal factors affecting the health of individuals.The home constitutes the important part of environment for most persons, and for...