two glass bulbs, one clear, one dark terminate a vertical U tube. Ink in the tube moves in response to the absorption of heat on the darker bulb. The U tube is mounted on a circular wooden base
1 large adjustable spark gap with 1/2 mm separation scale from 0 to 100 mm. Balls plated brass; silver coloured. For detecting spark transmissions following Hertz's method.
straight walled glass vessel with slight shoulder, silvered half way up the glass and has a tin band with thumb screw as an electrical contact. A brass rod terminated in solid copper wire filaments is suspended from a three armed cap. Perhaps an…
Bakelite case containing metal bubble sextant mk 9A; model no 12560/43; serial no 9054/42; patent nos 480112, 490621; case has two metal hinges; power cord has two small prongs on plug and battery on other end
large concave mirror set in dark wooden frame. In style of demonstration equipment from first half of 18th century and may well date from then. Original would have been held in a mirror stand.
Grey metal plate ' UNIVERSITY SPECTROMETER / No. 96978 MADE IN ENGLAND. ' With logo. One fixed and one adjustable tube with eyepiece. Scale on fixed tube: 150 - 0 - 150. Rotatable sample platform
On top ' C60302 ' With 3 circular adjustable feet. 8 bronze terminals; on 2 curved platforms (4 each). Glass window with bronze frame jutting out of the front.
