Indeed, labor is lightened by a thousand simple and cheap arts. Science enables us to accomplish with one man the labor of two or more men in almost every pursuit of life. It is a great practical mistake to suppose that this is only true of manufacturing establishments. It is equally so in the improved methods of farming and the improved implements by which the labor of the farm is accomplished. Farmers of enlightened views give their laborers the benefit of the newest and best improvements in their line. To attempt to rival the productions of such farmers, by exacting extra labor of the hands, is great injustice. For he who has the same work to do as another, with only half his means of doing it, has twice his work to do. “The ease of the patent spring,” and the “speed of the locomotive,” are not more important to the comfort of the traveller and his economy of time, which is money, in accomplishing his journey, than are the improved methods and instruments of farming to the ease, the economy, and the success of the farmer. “But slaves are careless, wasteful, and destructive.” So they are, and so perhaps would you be. There is but little difference between slaves and any others who labor for us in menial offices. All such operatives require a presiding mind to effect a proper division of labor, and have its eye in every place and on every thing. Without this, it is idle to prate about the wastefulness of slaves. If the master is himself too idle or improvident for this, he is culpable: if he has no capacity for it, he is fit to labor under the direction of another--that is, he is fit to be a slave; but he is not qualified to direct the labor of others--that is, he is not fit to be a master. _Slaves should be allowed reasonable time for rest._ All animal nature requires the refreshment derived from sleep. The muscular and nervous system of man requires not less than seven hours in twenty-four to repair the wastes of a day of active labor. This is a general rule. Some do with less: a few require more. But in every case there is a limit beyond which we cannot habitually go, without the sacrifice of health or life. The constitutions of some laboring men can bear a great loss of sleep; but it is on the same principle that a few constitutions can, for a long time, resist the effects of the daily use of alcohol. But still dram-drinking will tell, and so will the loss of sleep.