The top of the plate has a lid which is secured by two turning stops. The inside of the lid has a metal prong. On…
The top of the plate has a lid which is secured by two turning stops. The inside of the lid has a metal prong. On…
This is a wooden base with an Edison Carbon 32CP bulb mounted in a ceramic socket. On either end of the ceramic socket is a…
This instrument consists of a wooden base with a rectangular glass container in one corner; this is quite deep and open on the top. There…
A cylindrical glass bulb with a metal assembly visible inside standing vertically on a wooden base with six metal terminals aligned on the bottom side.…
A tapering glass cylinder is mounted horizontally on a turned wood base. Electrodes mounted in glass tubes project from the narrow end and base of…
A tapered glass cylinder on a turned wooden base with electrodes mounted in glass tubes that project from the main cylinder. A hinged Maltese cross…
A metal base, circular and painted black, supports a circular brass plate on a cylindrical central tower. The black base has a metal terminal located…
This is a wooden box covered in black paper containing a glass tube of length 24.8 cm and diameter 1.3 cm. The tube is filled…
This is a black metal box with perforations on the sides. The bottom of the box has four ceramic feet to stand on. The top…