Nicholson's hydrometer
Date: circa 1850
Inventory Number: 1998-1-0160
Classification: Hydrometer
Dimensions:23.5 x 4.8 x 4.8 cm, 0.2 lb. (9 1/4 x 1 7/8 x 1 7/8 in., 0.1 kg)
Description:
A metallic cyllinder with conical ends. One of its ends has a small hook, while the other is connected to a flat disk by a long thin metallic rod.