SUPPLEMENTARY PROJECTS 261 



funnel (Problem 6). (Seam should be riveted for ventilator 

 of size given.) 



3) Fasten conical and cylindrical parts of ventilator to- 

 gether with four strips of 1/2 " band iron or heavy tin. Ends 

 should be riveted. 



231 . Gutter Miter (Fig. 302) . 



1) Lay out pattern for each part of gutter. This will be a 



B 



FIG. 302. 



rectangle, length the long edge of the gutter and width one- 

 half the circumference of a 2" circle, plus 1/2" to roll over 

 heavy wire on outside edge (A, Fig. 302). Cut one end of 

 pattern square and other edge at 45 degrees (C, Fig. 302). 

 Leave lap on square end to fold, and solder against end of 

 gutter. Leave joint lap on end cut at 45 degrees. 



2) Fold edge of gutter over wire. Form gutter (A, Fig. 

 302). 



3) Solder end of gutter in position. 



