IT is not shade alone that makes it cooler under a tree in summer. The coolness of the tree itself helps, for its temperature is about forty-five degrees Fahrenheit at all times, as that of the human body is a fraction more than ninety-eight degrees. So a clump of trees cools the air as a piece of ice cools the water in a pitcher. That is why the legislature has authorized the park authorities of New York City to plant trees in the tenement districts. If the air can be made cooler and purer by the trees, fewer children will die of heat ailments. As four thousand more children die in New York during June, July, August, and September than in any other similar period of the year, the importance of adopting every known means to save life is undisputed.—Youth’s Companion.