Chiugefor Frame-Making. 



A BLOCK FOE MAKING FRAMES. 



This may be made as follows: Take a rectangular board 

 (Fig. 50) eleven and one-eighth by thirteen and a quarter inches. 

 On both ends of one face of this, nail hard- wood pieces (Fig. 50 , 

 e, e) one inch square and ten and three-fourth inches long, so 

 that one end (Fig. 50, g, g) shall lack three-eighths inch of 

 reaching the edge of the board. On the other face of the 

 board, nail a strip (Fig. 50, c) four inches wide and eleven and 

 three-eighths inches long, at right angles to it, and in such 



Fig. 50. 



position that the ends shall just reach to the euges of the board. 

 Midway between the one inch square pieces, screw on another 

 hard-wood strip (Fig. 50, d) one inch square and four inches 

 long, parallel with and three-fourths of an inch from the edge. 

 To the bottom of this, screw a semi-oval piece of hoop-steel 

 (Fig. 50, b, b), which shall bend around and press against the 

 square strips. The ends of this should not reach quite to the 

 bottom of the board. Near the ends of this spring fasten, by 

 rivets, a leather strap an inch wide (Fig. 50, a), which shall be 

 straight when thus riveted. These dimensions are for frames 

 eleven and one-fourth inches square, outside measure, and 

 must be varied for other sizes. Instead of the iron and strap, 

 some use two pieces of wood with a central pivot. The upper 

 ends of these levers are united by a strong elastic cord, so that 

 the lower ends are constantly pressed against the side pieces of 

 the block. 



To use this block, we crowd the end-bars of our frames 

 between the steel springs (Fig. 50. b, 6), and the square strips 



