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 TvV 1975
 		Photo: Ton Orizande
Newtonian Telescope. 1974
Vacuumless Barometer. 1977
Receiver with Loewe 3NF "integrated circuit", 2000

Standard resistors 0,001 ohm - 10.000 ohm 1999
Standard resistors 1999