246 SHEET-METALWORK 



iron the 1-5/8" surfaces to form right angles with the sheet of 

 tin and to make the vertical surfaces on the edges of the pan 

 (Figs. 271 and 272). 



Carefully fold the corner laps, lettered 6, Fig. 272, to come 

 in contact with the long, or 7", edge of the pan (Fig. 271). 



Place each corner of the pan over a square corner of a hard 

 piece of wood and square up and smooth with the mallet. 



Solder the inside of each corner of the pan between the end 

 and side edges, and also the edge of the corner lap (a, Fig. 

 272). Apply fluxing material and use soldering-iron, as de- 

 scribed in Sec. 209. 



Problem No. 4: To Construct a Receptacle Requiring the 

 Assembly of Heavy Pieces of Tin or of Galvanized Iron. 

 Projects Suggested for this Group: 



a) Watering trough (Fig. 273). 



b) Flower box (Figs. 274, 274-a, 274-6). 



c) Drip pan (Fig. 275, 275-a). 



Stock for watering trough: 2 pieces heavy tin, 12" x 5"; 

 1 piece heavy tin, 26" x 12". 



Note: Galvanized iron may be substituted. 



Tools A full set of sheet-metalworker's hand tools (Fig. 

 263). 



216. Constructing Watering Trough. Mark and cut 

 the ends of the piece of metal to form the trough, as shown in 

 Fig. 273. Fold the ends up on lines shown dotted in the fig- 

 ure, and then turn the piece of metal over, laying it along the 

 corners of a square-edged timber on the center line shown as 

 the long dotted line in the drawing (Fig. 276). Bend the 

 metal down over the timber until the surfaces on either side of 



