Such is the ordinary routine of the cleaning squads. On rainy or snowy days its job is increased, measurably. It is astonishing the amount of filth the sidewalks of New York can give up on a wet day. Yet rain, or no rain, filth or no filth, the cleansing must be thorough. The store at eight o'clock of the next morning must be as clean as the proverbial pin. An earnest of which you can obtain for yourself any day by pressing your nose, among the first of the impatient early shoppers, against the panes of the public entrance doors. Through the night these toilers work; silently, unseen, save by others of their own kind. Far below them, in the cellars of the great structure at Thirty-fourth Street and Broadway, there are other squads who stand to unending tricks at the boilers, the engines, the dynamos and the other mechanical appliances of the organism. The fires may never die; the lights never go out--not even from one year's end to the other. And so that the very heart and blood and nerve-force of Macy's shall in truth be unending there are engines and boilers and dynamos in the mechanical plant under the Thirty-fourth Street sidewalks. As many as five hundred tons of coal can be housed in the bunkers hard at hand. The entire plant could easily light and supply the other necessary electric current for the needs of any brisk American town of five or six thousand people. Eight o'clock, and the night superintendent of the store unlocks the first of its outer doors. But not to the public. Mr. Public's hours do not begin until a full sixty minutes later. First the store must be made ready for his coming. It is not enough that it shall be thoroughly cleaned in every fashion. The stock must be displayed anew; the long miles of dust coverings lifted off, folded and put away until the coming of another evening. Which means, of course, that the store folk must come well in advance of its patrons.