Browse Items (3473 total)

a glass centigrade thermometer, scale -10 to 100 deg C. Black ink liquid. In cardboard tube

Leslie's differential thermometer. Double bulbs on ends of a tube set into delicate wooden base. One bulb blue, one clear; liquid (blue) broken column. Faded mark on underside base showing existence of rectangular label.

heavy brass seconds pendulum (lead filled? not examined), with twin spring suspension.

' 1000 OHMS / 0.1 AMPS '

Plate on side: ' 7.5 AMPS / FOR USE WITH MODEL S66, N61793 '. With 2 terminals.

cylindrical box with "Atwood's Replace Riders" written on top. Inside contains 15 metal slides of varying size with a hole punched in each of them.

With separate closing end. 5 coils per leg. Brass terminals. Combination typical of early to mid 19th century coils.

The curved vanes have been calculated to give straight-line tuning across the dial. Behind the dial, a travelling pointer illuminated by two small bulbs can be swept around to tune in to the stations. 2 (?) gangs of closely spaced vanes. Hand…

Bulls-eye lens with ball and socket joints at either end of stand rod. For illumination of microscope specimens.

Brass pump with T handle; detached end piece. With leather washers.