--Was there ever anything so amazing as this blue-glass craze that has taken possession of about two-thirds of those who are included in the term "everybody"? It would seem as if there were no limit to man's credulity, particularly upon those subjects which concern him most nearly, religion and the preservation of bodily health. In both he is ready to listen to any plausible person who will tell him to "do some great thing." Tell him that he must live a life morally pure and physically clean and sober, that he must not sin against his own consciousness of right, and that he must wash himself and eat simple, wholesome food, conform himself to the indications of his physical structure, and he will assent in a careless way, and immediately violate every rule of sound morals and physiology. But tell him that he must make a pilgrimage to Rome, or that he must lift six or seven hundred pounds daily, swallow pills and bitters, or live in a blue conservatory, and he will prick up his long ears, and do it if he can. What wonder that quacks all make money, and that the "patent medicine interest" should have a representative in Congress! But quacks and patent medicines usually must have the benefit of a few years of copious advertising before they effect their purpose; whereas blue glass was written into popular favor with the dash of a pen. It trebled in price in less than so many weeks. The notion that light should be filtered of every ray but the blue one to produce the best effect upon the human body and brain is certainly one of the most fantastic that has been broached since the days of the medical mountebanks. The best use to which this glass can be put is to the making of hot-beds. Let our early lettuce and pease by all means be brought forward under sashes glazed in blue. What cauliflowers we shall have, and what cabbages! At present the crop of cabbage heads, to be sure, promises to be very large through the intervention of blue glass; but much the greater number of them appear to be growing upon human shoulders.