Tatjana J. van Vark
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Various works
Photo: Ton Orizande
Polarimeter - half shadow. 1971
Scan: Sam S.
Calorimeter. Temperature difference multiplied by flow. Prototype T.J.v.V. 1975
Photo: Ton Orizande
Newtonian Telescope. 1974

Vacuumless Barometer. 1977

Receiver with Loewe 3NF

Standard resistors 0,001 ohm - 10.000 ohm 1999

Standard resistors 1999