56 



HEAT 



struck against iron or steel it removes little pieces, and 

 the friction is so great that they become almost white 

 hot. These tiny particles used to be caught upon shred- 

 ded linen, called tinder, which caught fire and burned. 

 As soon as the fire was obtained the tinder was covered 

 up and kept for next time. 



Flint was also used for discharging guns. The 

 hammer of the gun carried a piece of flint, and as it fell, 

 it touched a piece of steel sending a shower of sparks 

 down into the powder. These guns were called flint- 

 locks. 



Experiment 29. The Flint and Steel Gaslighter. 



Apparatus: A friction gaslighter. 



Materials: Alcohol, piece of cloth. 



a. Examine the lighter, noticing the steel file and 



Cut supplied by the Safety Gas Lighter Co. 



