Show how to solder aluminum to solder aluminum dirst make a soldering bit froni from a piece of or v 4 indies inches rouno round or square squar e aluminum next tin the parts to be soldered with a composition of 0 81 per cent tin 10 per ceni cent and 3 per cent copper after the copper has aured the aluminum should he be added little by little stirring the mixture thoroughly all the tinie time the tin and a small portion of tallow should be adad d do not OTer over lipil lipot the composition popular belew si iena v |