A motor shaft extended with a hardwood dowel is held against a wood block. Disc 15-01 Chuck up a dowel in an electric drill and make smoke by drilling a board. 4B60.60 flint and steel H-170 Sparks from flint and steel or a grindstone show heat from work. H-169 Pour ether, alcohol, or water into a tube, cork, and spin by a motor until the frictional heat causes enough vapor pressure to blow the cork. H-5a.3 Heat ether by a motor driven friction device until a cork blows.
Water is heated in a stoppered tube by a motorized friction device until the cork blows.
H-5a.2 Heat a tube until the cork pops off.