The "Stock Exchange" occupies the main hall, which is on the floor above the Long Room. This hall is one of the most beautiful apartments in the city. It is seventy-four feet long, fifty-four feet wide, and fifty-two feet four inches high. Its lofty ceiling is arched and decorated with bright red and buff penciling upon a sky blue ground, while the walls are relieved by broad square pilasters, painted in brilliant bronze, with tall windows and arched tops rising between, and other spaces between the columns covered with drapery in more subdued colors. Up to a few feet from the floor the painting is in a dark-hued bronze. The coloring is in the Moorish style throughout, and the effect of the whole is very fine. At the north end is the platform for the desks of the Vice-President and Secretary, and on each side of this is a black board for recording the quotations of the session. On the same platform is the desk and instrument of the stock telegraph operator. At the south end of the hall is a light gallery capable of holding 200 persons, for the use of visitors. In connection with the hall are several committee, cloak and ante-rooms. In the centre of the ceiling is a huge ventilator, beneath which is suspended the lighting apparatus, containing 100 burners. A chamber five feet in depth underlies the hall and the adjoining lobby, and in it are laid pipes for conducting warm air. [Picture: THE STOCK EXCHANGE.] At the base of the walls is an open iron grating covering the apertures of a shaft leading from the engine-room. Through this shaft warm air is forced into the hall in winter, and cool air in summer, thus securing perfect ventilation. The Stock Exchange Board is an incorporated company, and is the only lawful association in the city for the transaction of business connected with stocks. It consists of 1050 members, but the control of its affairs is vested in a council of forty members, together with the President, Secretary and Treasurer in their unofficial capacity. The admission fee is $5000, and a seat in the Board becomes the absolute personal property of the broker, who can sell or otherwise dispose of it as he would of his watch or his coat. Candidates are admitted by ballot and with great care, the object being to secure the exclusion of all but men of known integrity, for the Board requires the most scrupulous good faith in the transactions of all its members. Four black balls will prevent the admission of a candidate whether he wishes to enter by purchase or otherwise. Candidates must submit to a close scrutiny of their previous lives, and must show a clear record. There are two daily sessions of the Board, one in the morning and the other in the afternoon. The securities offered at these meetings are divided into two classes, the Regular and the Free List. No stock or bond can be dealt in until it has been rigidly examined by a committee, and found to be a _bona fide_ security.