?74 
EXPLANATION OF PLATES. 
V'Milwl A (loviou” I’oi' sociu'ing the conibs not imnely xtraUjJil^ but 
o( uniform thtchiess. It will bo tested on a large scale, this season 
(ISdO), and the results given to the public. In those instances in 
wliich it has been tried, it has succeeded admirably. 
Gage-Bloek 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 i" x 9i" x J". {b b) Guides, for sides 
(u u), of frames, fastened to (a), equally distant from its ends, and 
so as to leave 17j” between (b b), and i" from upper edge of (n) 
to ends of (bb). {c c) Huttons for holding sides of frames (« u), 
against {bb), 6J''x (ff) Guides in which the top tri¬ 
angular comb-guide is placed, in order to have the top strip (t) 
nailed thereto; each piece (/) is 21J"x2"xr, and they are 
beveled from one edge, back ^V'l afe then fastened to (a), 
forming a triangular groove, each side of which is i". Two tri¬ 
angular pieces, 4"xi"xi"x2r, are fastened (Fig. fi) at each 
end of the groove, ij;) Guide-strip, J''xt^"x 19J, fastened to 
(/) i" from its beveled edge, (h) Guide-strip, J"XiV'x3J", 
fixed on and across the pieces (//), from their ends. To nail 
the frames together, put the triangular comb-guide (u) in the 
groove formed by the pieces (//) : place the piece (I) on the top 
of (m), and against the guides (g) and (/i), and nail it to («) with 
two brads each about 2" from the end. Proceed in this way until 
all the triangular guides arc nailed to the top strips. Now turn 
over the gage-block and secure the vertical pieces (««) against 
the guides (6 i), by the buttons (ce), and nail the bottom (f) to 
(u u). with two brads at each end. Turn the gage block, and place 
the top of the frame (I), whish has before been nailed to the guide 
• This dcrico U iubstantlally tlio same with tUo ^no alltidcd to on p. 208 ; Mr 
Colvin a, however, was Invontod before mine. 
