ignorant by the thoughtless or vicious, and many other unfortunate influences, combine to a greater or less extent in all large boarding-schools.

Having had charge of one myself for nearly ten years, in which, as it seemed to me, every thing was done that could be to abate such evils, I have concluded that such institutions for both boys and girls may be called successful only on the same calculation as would be made in cultivating a garden on the top of a house. The best of soil, seed, manure, and labor, with water and sun and awnings, may be provided, and yet the proper place to make a good garden is on mother earth. And so the proper place to educate children before maturity is under the mother's care, with the coöperating aid of a school.

If I could narrate one half of the sad histories of the ruined boys and girls, and the consequent agonies from blasted parental hopes, that have come to my personal knowledge, where health or morals, or both, were destroyed for a whole life at

large boarding-schools, this false and fatal method would be greatly abated.

And here I would direct attention to one item so pernicious, and yet so common and so misunderstood as to excite constant wonder and regret as connected with boarding institutions for both sexes, and that is the want of effective methods for providing pure air. In private families, only a few lungs vitiate the inhaled air; but the larger the number in one building, the larger are the arrangements needed for emptying out the foul air and introducing the pure.

An open fire is a sure and certain method. But when buildings are warmed by hot-air furnaces, or by hot-water or steam-pipes, the almost inevitable results are pernicious. In the case of heated air from a furnace, it always will find exit from a building in the shortest or most available direction, and then all the rooms not in this line of draught will have the air nearly stationary, to be breathed over and over again by their inmates.

Heating by steam or by hot-water pipes

involves still greater difficulties, when no arrangement is made for carrying off the foul air, inasmuch as it is the air in the house which is heated without introducing pure air.

This is the most dangerous of all methods of warming when there is no connected ventilating arrangement, while it is the best and most agreeable of all methods when properly managed. Mr. Lewis Leeds, ventilating engineer in New-York City, has invented the following method. The coils of steam or hot-water pipes are placed close to a window, with an opening at the bottom of it, regulated by a register which admits pure air directly on to the coils, and thus it is warmed.

Thus a person can sit by the coils and secure radiated heat as from a fire, have the light of the window and the influx of perfectly pure and yet warm air. In addition, every room has an opening both at top and bottom into a warm-air flue, through which the impure air of the room is constantly carried off.