How Long To Sleep

as lite becomes concentra ted, and its pursuits more eager, short sleep and early rising become impossible. We take more Bleep than our ancestors, and we take more because we want more. Six hours' sleep will do for a plowman or a bricklayer, or any othor man who has no exhaustion but that produced by manual labor, and the sooner he takes it after his labor is over the better. But for a man whose labor is mental, the stress oí' WOrk is on his brain and nervous system, and for him who is tired in the evening with a day of mental application, neither early to bed no early to riso is wholesome. He needs letting down to the level oí' repose. The longer the interval between the active use of the brain and his retirement to bed, the better his ohance of sleep and rofreshment. To him an hour after midnight is probably as good as two before it, and even then his sleep will not so completely restore him as it will his neighbor who is physically tired. He must not only be to bed later, but lie longer. His best sleep probably lies in the early morniug hours, when all the nervous excitement has passed away, and he is in absolute rest.