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Holmgren Colour Vision Test
COLOUR VISION TESTS
colour vision test
Mid 20th c.
wool; card
1999.3520
COLOUR VISION TESTS
colour vision test
Mid 20th c.
wool; card
Woollen skeins for testing colour blindness. Three skeins numbered 1 to 3: blue/green, pink, red. 41 assorted colour skeins with four digit numbers. Also an explanatory leaflet.
1999.3520
Gift of E. Bray(?)