Namely, it was describing the rules of tag:
I. — Tag is a game in which three or more players try to touch each other, not for money, but for fun, and with their hands.
II. — It may be played by any child over two and under ninety who is strong in wind and limb, and who has the time to devote to it.
III. — The player who is appointed by lot to touch the others is called “IT.” He should be able to stand on his feet and run if he is to be at all expert in the game.
This comes courtesy of a delightful new blog, Sunday Magazine, which picks one article each week from the New York Times Magazine…100 years ago.