One of the remarkable phases of our present-day existence is the steady and substantial progress in almost every line of human endeavor. We now have comforts and conveniences that were unthought of by our forebears. Science and the industries have shown wonderful advancement. The hardships of our ancestors are unknown to us. There is no longer any necessity for enduring the hardships that they endured. And yet, these very comforts and convenieqces that we enjoy are our undoing.