ELECTRICITY AT THE WORLD'S FAIR. 



41 



has been found capable of welding metals which have heretofore 

 resisted all attempts to unite them direct, and which have there- 

 fore had to be brazed or soldered. Wrought iron, copper, brass^ 



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silver, platinum, gold, aluminum, and even cast iron may not 

 only be welded together, but may also be welded to one another 

 in many different combinations. In addition to welding, all sorts 

 of brazing may be done by this method, as the same heat which 



VOL. XLIT.- 



