ARTIFICIAL AIDS TO COMB-BUILDING. 
193 
understood. The side bar {sd, A, Fig. 53) has a 
peculiar dovetail worked on its upper end, which fits 
into a corresponding hollow cut transversely into the 
two pieces which, standing parallel to each other, 
form the top bar. It is intended to send out these 
frames in the flat, the foundation being inserted 
during the building-up. The ingenious frame-block 
(Fig. 54) makes this operation quite delightful, and 
Fig. 54 .— Lee’s Block for his Standard Dovetailed Frame (Scale, i). 
A, Block m situs, Stop ; c, c. Cheeks ; bb. Bottom Board ; fr, Foundation 
Rest; b. Button; kh. Hand Hollow; sb, sb. Side Bars of Frame; br, Bottom 
Rails. B, Longitudinal Section through Block— Letterings as before. 
even to the novice who may have no mechanical 
ability it is perfectly easy. The half top bar is 
first dropped into position between the foundation 
rest {/r) and the stop (j‘). The side bars are next 
added, being slipped between the cheeks (c, c), and the 
foundation rest, as seen in the section, when their 
dovetails are driven home, firmly connecting them 
with the half top bar; the buttons (d) being turned 
so as to keep the former firm until completion. 
VOL. II. O 
