374 EXPLANATION OF PLATES. 



vented a device* for securing the combs not merely straight, but 

 of uniform thickness. It will be tested on a large scale, this season 

 (1860), and the results given to the public. In those instances in 

 which it has been tried, it has succeeded admirably. 



Gage-Block for fastening the movable frames together. ■ Figs. 6, 

 7, and 8, page 24. 



Fig. 6 is a view of the front of this block, Fig. 8 a view of the 

 back, and Fig. 7 is a cross-section. 



(a) Foundation board, 21-J"x9i" xi". (6 6) Guides, for sides 

 (u u), of frames, fastened to (a), equally distant from its ends, and 

 60 as to leave 171" between (6 6), and i" from upper edge of (o) 

 to ends of (66). (c c) Buttons for holding sides of frames (u«), 

 against (6 6), 6Vxli"xi". (//) Guides in which the top tri- 

 angular comb-guide is placed, in order to have the top strip [t) 

 nailed thereto; each piece (/).is 21t"x2"xi", and they are 

 beveled from one edge, back -^", and are then fastened to (o), 

 forming a triangular groove, each side of which is J". Two tri- 

 angular pieces, i" x f " x i" x 2t", are fastened (Fig. 6) at each 

 end of the groove, (g) Guide-strip, •J"x-^"xl9J, fastened to' 

 (/) i" from its beveled edge, (h) Guide-strip, i"x-^"x3|", 

 fixed on and across the pieces (//), i" from their ends. To nail 

 the frames together, put the triangular comb-guide (u) in the 

 groove formed by the pieces (//) : place the piece [t) on the top 

 of («), and against the guides (g) and (h), and nail it to (u) with 

 tVv-o brads each about 2" from the end. Proceed in this way until 

 all the triangular guides are nailed to the top strips. Now turn 

 over the gage-block and secure the vertical pieces [u u) against 

 the guides (6 6), by the buttons [cc), and nail the bottom [t) to 

 (u «), with two brads at each end. Turn the gage-block, and place 

 the top of the frame ((), whiih has before been nailed to the guide 



* This device is substantially the same with the one alluded to on p. 208 ; Mr 

 Golvin's, however, was invented before mine. 



