If the frames are accurately made there will then be one fourth inch space at each end of the frame just below the top bar and three-eighths inch at each end of the bottom bar. Between the frames and the bottom board, on which the hive rests, one-half inch space answers, but five-eighths inch is preferable. The width of the hive will depend, of course, upon the number of frames decided upon, 1⅜ inches being allowed for each frame, and three-eighths inch added for the extra space at the side. If a top story to contain frames for extracting is placed over the brood chamber, its depth is to be such as to leave the space between the two sets of combs not over five-sixteenths inch, and in this, as in the lower story, the space between the ends of the frames and the hive wall should be no more than three-eighths inch. A good way to keep rain from beating in between the stories and also to retain the warmth of the bees in outdoor wintering, yet admit of suitable provision for the upward escape of moisture, is to have the second story fit over the top of the lower one, and rest on ledges made by nailing strips around the latter one-half inch below the upper edge. As this makes the upper story nearly 2 inches larger from front to rear than the lower one: it will be necessary when arranging this story for frames to make the front and rear double-walled. This is easily done by tacking on the inside of each end two half-inch strips, on which a halt-inch board is then nailed. These inside end pieces should be only wide enough to reach within three-fourths inch of the top edge of the outer ends, and, like the lower story, should be finished at the top with a metal rabbet for the frames to rest on, or the inside piece may be made to come within three-eighths inch of the top and its upper edge beveled so the frames can not be greatly propolized, an arrangement which answers very well for this story. [Illustration: Fig. 29.--The Langstroth hive--Dadant-Quinby form--cross section showing construction. (From Langstroth.)]