One season two new roof gardens have opened. The one at the top of Grand Central Palace is large enough for a regimental drill room. The band is imprisoned still higher in a turreted affair, and a person who prefers gentle and unobtrusive amusement can gain deep pleasure and satisfaction from watching the leader of this band gesticulating upon the heavens. His figure is silhouetted beautifully against the sky, and every gesture in which he wrings noise from his band is interestingly accentuated. The other new roof garden was Oscar Hammerstein's Olympia, which blazes on Broadway. Oscar originally made a great reputation for getting out injunctions. All court judges in New York worked overtime when Oscar was in this business. He enjoined everybody in sight. He had a special machine made--"Drop a nickel in the judge and get an injunction." Then he sent a man to Washington for twenty-two thousand dollars' worth of nickels. In Harlem, where he then lived, it rained orders of the court every day at twelve o'clock. The street-cleaning commission was obliged to enlist a special force to deal with Oscar's injunctions. Citizens meeting on the street never said: "Good morning, how do you feel to-day?" They always said: "Good morning, have you been enjoined yet to-day?" When a man perhaps wished to enter a little game of draw, the universal form was changed when he sent a note to his wife: "Dear Louise, I have received an order of the court restraining me from coming home to dinner to-night. Yours, George." But Oscar changed. He smashed his machine, girded himself, and resolved to provide the public with amusement. And now we see this great mind applying itself to a roof garden with the same unflagging industry and boundless energy which had previously expressed itself in injunctions. The Olympia, his new roof garden, is a feat. It has an exuberance which reminds one of the Union Depot train-shed of some western city. The steel arches of the roof make a wide and splendid sweep, and over in the corner there are real swans swimming in real water. The whole structure glares like a conflagration with the countless electric lights. Oscar has caused the execution of decorative paintings upon the walls. If he had caused the execution of the decorative painters he would have done better; but a man who has devoted the greater part of his life to the propagation of injunctions is not supposed to understand that wall decoration which appears to have been done with a nozzle is worse than none. But if carpers say that Oscar failed in his landscapes, none can say that he failed in his measurements of the popular mind. The people come in swarms to the Olympia. Two elevators are busy at conveying them to where the cool and steady night-wind insults the straw hat; and the scene here during the popular part of the evening is perhaps more gaudy and dazzling than any other in New York.