798 Journal of Agriculture, Victoria. [11 Dec, 191 i. 



the drift into the hole and beating^ the hot iron all around, it is forced 

 to the proper size and shape. 



When obtaining the welding heat, care must be taken to turn the work 

 over frequently to prevent the dirt sticking to the top side. The effect 

 of this would be to burn small holes in the metal, so that a goo-d finish 

 could not be produced. The scarfed side should be downwards just prior 

 to removal from the fire, in order that it may have the greatest heat at 

 that part. 



In working on the anvil, the thin edge of the scarf should be the 

 first part struck with light and quick blows, and then heavier and slower 

 blows on the thicker portion of the weld. By this time, the temperature 

 will have fallen below the welding point; but if the scarfing, heating, and 

 hammering have been correctly done, the union should be complete. After 

 welding, the iron is rough, irregular in section, and scaly, and requires to 

 be correctly shaiDed and finished. 



40. HINGE. 



a. First operation— scarfing tli9 end. h. Second operation— preparing tlie weld. c. Drift. 



d. Finislied hinge. 



For finishing work of this description, the scales should be removed 

 with a file and the anvil brushed clean previous to using the flatterier for 

 smoothing and straightening the work. If the face of the anvil and 

 flattener be wetted with water during the finishing operations, a much 

 cleaner job is the result. The effect of the water on the heated iron, 

 when compressed as by a blow, causes a rise in temperature which generates 

 steam, and the result is that an explosion takes place and the steam and 

 small particles of scale are ejected and the surface of the iron is left very 

 smooth. 



Fig. 41 shows another form of a simple pair of hinges, used chiefly 

 on gates. They will permit the gate opening either way, and can be so 

 hung that it will clo.se of its own accord, providing that a .suitable catch 

 is made. It is an advantage to hang a f armvard gate in this manner ; 



