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Square pavement brick from Babylonia (Southern Iraq), 2nd millennium BC.
Components from atmospheric pollution smoke filter and volumetric sulphur dioxide apparatus
Envelope containing nylon belts and top pulleys, part of mass miniature radiography set, Europe, 1960-1961
X-ray film hanger, part of mass miniature radiography set, Europe, 1960-1961
Safety monitor for use with mass miniature radiography set, Netherlands, 1960-1961
Mutual inductor for use with D.C. Gall's co-ordinate a.c. potentiometer
Electricity and Magnetism