Molecular models for demonstration to the visually impaired, 20th century.

Molecular models for demonstration to the visually impaired, 20th century.
3 4 c m
40cm
actual image size: 32cm x 26cm

Description

These are simple models showing the structure of various molecules. Designed for use by visually impaired people, the balls are of various sizes, each size representing a different element. For sighted people, the elements are usually differentiated by balls of different colours. The models represent (clockwise from top); benzene (C6H6), water (H2O), carbon dioxide (CO2) and oxygen (O2).

© Science Museum / Science & Society Picture Library

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