156 THE BEE-HIVES. 
angular edge, but where comb foundation is used, the flat 
top bar will be found much better (693). Above all, the 
outside measurements of the frame must be carefully pre- 
served. 
323. The width of the top bar has something to do with 
the amount of bridges and brace combs (397), built by 
the bees, between the brood-chamber and the upper stories. 
A wide top bar, leaving but a narrow space for passage 
above, will almost altogether prevent the building of bridges, 
but it has other disadvantages that have rendered it unpop- 
ular, although some bee-keepers of note—Col. Camm of 
Illinois, among others—use it. In producing extracted 
honey (749) these bridges and brace combs do not annoy 
much. 
324. L. Simpricity Frame (fig. 59).—This frame has 
been made and sold so largely by A. I. Root, and other 
dealers, that it is established now. The length of the top 
bar and the height of the frame are the same as those of the 
Standard L. Frame. the frame itself being one-fourth inch 
longer outside. They are sometimes made with metal cor- 
ners invented by A. I. Root (fig. 62). 
Fig. 62. 
METAL CORNER AND ITS POSITION IN TNE HIVE. 
The engraving is full size. The % board B is supposed to be the end of 
the hive. 4 is a section of the metal rabbet, and C is the corner. E is 
the space between the hive and the frame; Fis the beveled edge to receive 
the upper story.—(‘‘A. B. C. of Bee-Culture.’’) 
325. These tin corners have the advantage of making 
the frames very strong; and as the tin shoulder rests by a 
