Browse Items (3473 total)

a mercury normal thermometer 6 Deg C max, with upper metal end cap. Housed in cardboard tube

glass specific gravity hydrometer, black lead weighted, scale 1400 to 1600. In cardboard tube

a circular wooden lead weighted base with turned wooden leg terminating in an apparatus plate. The stand is telescopic with adjustment by a wooden screw

cylinder with screw hole on top of wooden base with groove for running along optical bench.

a general purpose mercury glass total immersion thermometer scale 0 to 200deg C. In clear plastic case, cat No.10046

the apparatus rotates a drum that has a window slot containing a glass insert, possibly for gauging rotational speed of a shaft viewed through the window or light projected through the window; hand or belt driven

Plate on side:' 1.5 AMPS / FOR USE WITH MODEL S66, N61793 '. With 2 terminals.

cylindrical brass base with 3 holes through it.

glass handle with brass tapped ferrule; possibly for handling electrically charged objects

Whelk shell that fluoresces in the cathode rays; presumed to have been acquired as a set with five others