The Composition of Matter 



25 



chloric acid to cover the lower end of the tube. Collect the gas 

 which will be made, by allowing it to pass through the rubber 



National Welding Equipment Co. 

 OXY-ACETYLENE WELDING 



A mixture of oxygen and acetylene gas whose flame is so hot that it melts 

 and fuses the toughest metals. 



tube leading from the flask into a water-filled bottle inverted in 

 the tray. Test this gas. It will be found odorless, tasteless and 

 colorless. 



