CO-EDUCATION.

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youth. These principles we have learned tobe, three for the two sexes in common, and one for the peculiarities of the female sex. The three common to both, the three to which both are subjected, and for which wise meth­ods of education will provide in the case of both, are, 1st, a sufficient supply of appropriate nutriment. This of course includes good air and good water and sufficient warmth, as much as bread and butter ; oxygen and sun­light, as much as meat. 2d, Mental and phys­ical work and regimen so apportioned, that repair shall exceed waste, and a margin be left for development. This includes out- of-door exercise and appropriate ways of dressing, as much as the hours of study, and the number and sort of studies. 3d, Sufficient sleep. This includes the best time for sleeping, as well as the proper number of hours for sleep. It excludes the murdering of sleep, by late hours of study and the crowding of studies, as much as by wine or tea or dissipation. All these guide and limit the education of the two