Novel Dry-Ice Gun Extinguishes Candle (Jul, 1940)

I’m not quite sure why this poor kid has to put the candle on his head to prove some “scientific” point. It looks like it’s about to set his hair on fire.

Novel Dry-Ice Gun Extinguishes Candle
To within 1/4″ of the edge, cut out the top of a cardboard salt box, and tie a piece of rubber balloon over it. Cut a 1-1/2″ hole in the opposite end, roughening its rim with a penknife. Load the gun with carbon dioxide gas by inserting “dry ice.” Aim the gun, tap the rubber, and an invisible ring of gas will smother a candle flame six to eight feet away. You can stage an amazing “William Tell” stunt with the gun as shown below.