Figure II. is a perspective view of the Controllable Hive, with the upper part of the case removed, showing the position of the glass honey boxes at the top, with the feeder T in the rear, and also showing the position of the side boxes J, in the large frame O. as shown more clearly in Figure III. The inner ends of the side boxes J, next to the brood section, are formed of boards C, narrower than the boxes, leaving side spaces, to allow the bees to pass in and out freely from the brood section to the side boxes. When top boxes and feeder are not on, a board called a honey board is placed over the brood section, fitting very closely, so as to confine the heat, generated by the bees, to the brood section. In winter the brood section is covered by a ventilator made as follows: Take a piece of fine board one-half inch thick. Get out two pieces, each one inch wide and twenty-two and three-eighths inches long, and two pieces of same width each ten inches long. Nail the short pieces on to the ends of the long pieces, forming a frame nine inches wide by twenty-two and three-eighths inches long, inside measurement. Over this frame tack a piece of wire cloth twenty-three and three-eighths inches long, by ten inches wide, of a very fine mesh. This frame will just fit over the brood section, and give a space between the wire cloth and the top of the comb frames of about one and three-eighths inches. Tack the wire cloth on closely, so no bees can escape when the ventilator is in place. This ventilator is to be used only in winter, as directed under the chapter on Wintering. Figure III., on next page, is a perspective view of a set of side surplus honey boxes and their inclosing frame, with measurements of the different parts. [Illustration: Side Surplus Honey Boxes. Fig. III.] The brood section of the hive is twenty and one-half inches long, nine inches wide and twelve inches deep, inside measurement. The brood section contains six movable comb frames, resting on rebatings, and held at the proper distance apart at the bottom by a brace. The only plate where these frames touch the hive, is where the top bar of the comb frames rests on the rebating at the ends. To the top bar of each comb frame (on the under side) is nailed a triangular comb guide to aid in securing straight combs. Each side of the triangle is one inch wide. A piece of board one inch wide and three-eighths inch thick is laid on top of the comb frames lengthwise in the centre on this piece. The ends of the top boxes rest in the center where they come together. Notches are cut on the underside, crosswise, to admit of the passage of the bees.[13]