not be of any benefit. On the contrary, it might cause anaemia, and its accompanists, such as neurasthenia, melancholia, fear, etc. Breathing in the right way will produce better blood, more nerve power, and last, but not least, a good humor.
Apropos humor,—there are authors who, now and then in the titles of their books or articles, admonish one to be cheerful, to laugh and smile so as to avoid illness. Further perusal of the text, however, will show that they admit that this depends chiefly upon the physical condition, and they advise the practice of exercises, in order to make people physically fit first. This is, of course, true, since it is difficult for most people to be of a good disposition and smile and laugh when the body is not in fit condition.
