US$ 13.34
A 1913 Fiat Tipo Zero
from the Thames
View of London Bridge
interior view of Lincoln's Inn old hall
An otheoscope mb-code 1237902 A 1913 Fiat Tipo ZeroAn otheoscope with fixed vanes of oxidised copper and coloured disc above it. An instrument designed for measuring the mechanical effect of radiant energy, a modification of the radiometer. Mounted in a partial vacuum, the central rotor spins when the vanes are exposed to light. Chemist William Crookes (1832 1919) initially believed the vanes with black surfaces were pushed around by pressure from light radiation. This was incorrect and other theories
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