Title
Trevelyan's rocking apparatus
Identifier
ABDNP:201245a
Description
piece of metal on the end of a metal rod. The metal rod has a brass ball on the other end. The device is placed on metal block and heated at one end. When left to cool it moves slightly emitting a rocking sound.
Date
1860-1890
Format
length 445mm, width 48mm, height 12mm
metal and brass
Creator
unknown