It is not at all difficult to understand that if you are constantly taking money out of the bank, you must also be constantly putting money in, or some day you will be told that your account is already overdrawn and your draft will not be honored. One can overdraw for a time, and right here is the danger with young people. They fancy, because they are not at once told that they are overdrawing, that their bank account is unlimited, and then, when it is too late, they find themselves on the verge, if not clear over the verge, of bankruptcy. How shall you know whether you sleep enough? If you will make it a rule to go to bed by ten o'clock every night, and go to sleep at once, and sleep soundly and waken with a clear head and a rested feeling, you may infer that you have slept enough. If you are still tired or dull, something is wrong. You may have been in bed long enough, but your room may not have been ventilated, and so you may be poisoned by breathing over and over again the emanations from your own body. Or for some reason the process of digestion and assimilation may not have been carried on, and poisons have been created instead of being eliminated. If you waken unrefreshed, I should want to inquire into your habits of life. Was there opportunity for fresh air to enter your room? Was there in it no uncovered vessel, no old shoes in the closet, no soiled underclothing, nothing that could contaminate the atmosphere? Did you eat a hearty supper late in the evening? Is your system oppressed with a superabundance of sweets? Are you living on simple, wholesome food, or eating irregularly of all sorts of trash? There may be many causes, you see, for your "tired feeling" in the morning, and instead of taking some "Sarsaparilla," or other drug, I should try to find out the cause and remove it. Many people are afraid of night air, and scrupulously shut it out of their sleeping-rooms, and yet, what kind of air can you get at night but night air? And is it not better to have pure night air from out of doors than the impure night air of a close room? I once went with two ladies to ascend the Rigi in Switzerland, in order to see the sun rise. One of these was a Polish countess, who took with her a little black-and-tan terrier. The hotel at the Rigi Staeffel was crowded, and we thought ourselves very fortunate to secure a room with three beds. The Countess disposed herself in one bed with her little dog, and I took one bed, saying to my friend, "You'll please open the window before you go to bed?" "O certainly," she replied. The little Countess sprang up in evident alarm. "Open the window!" she cried; "why, we'd all take our death of cold! I beg of you don't do it. I could not sleep a wink if the window were open."