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…

3/4 portrait of Dr James Beattie, wearing doctorate gown, 'Essay on Truth' under left arm. Truth as an Angel holding balance plunging Scepticism, Sophistry, Infidelity (Voltaire, Hume, Gibbon) into darkness. Painted 1773 in London during Beattie's…

A heavy metal tripod base supporting a glass rod to which is attached a brass clamp. The base is brown and gold painted cast iron

three large bulbs with liquid mercury and alcohol are mounted vertically with brass latches against a wooden board and white card. No scale.

piece of metal on the end of a metal rod. The metal rod has a brass ball on the other end. The device is placed on metal block and heated at one end. When left to cool it moves slightly emitting a rocking sound.