apparatus to show expansion of metal upon heating
Date: 1870-1900
Inventory Number: 1998-1-0075
Classification: Demonstration Apparatus
Dimensions:27.5 × 18 × 10 cm (10 13/16 × 7 1/16 × 3 15/16 in.)
Description:
A wooden rectangular base is supported by four brass spherical feet. On the base is a turned brass holder in which is a curved rod ended by a hook. A metallic sphere is hung on it by a thread. The sphere is over a circular ring held in place by a sliding attachment found on the curved rod.
The number "85" has been painted in black on the base.