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Mercury immersion thermometer with intrical ground glass stopper

Mercury immersion thermometer with intrical ground glass stopper

1960-1989
Two glass alembics with stoppers by Monax

Two glass alembics with stoppers by Monax

1960-1980
Graded interference filter for obtaining near monochromatic light of any colour, by Jenaer Glaswerk, Schott & Gen, Mainz, in fitted case

Graded interference filter for obtaining near monochromatic light of any colour

1945-1989
Graded interference filter for obtaining near monochromatic light of any colour, by Jenaer Glaswerk, Schott & Gen, Mainz, in fitted case

Graded interference filter for obtaining near monochromatic light of any colour

1945-1989
Measuring cylinder, 25ml measuring cylinder with a ground glass neck, made by Schott and Gen, Mainz, Germany, date of manufacture unknown. The graduations are 0.2ml, with 2ml numerical markings. The object is inscribed with the circular Schott and Gen, Mainz logo with the triangular 'corners', below is "A & Co", "cm3", "in 20oC".

25ml measuring cylinder

unknown