Three-colour projection apparatus, c 1900.

Three-colour projection apparatus, c 1900.
3 2 c m
actual image size: 32cm x 24cm


In the 1860s James Clerk Maxwell (1831-1879) showed that all colours are a mixture of red, green and blue light. This three-colour projection apparatus (Ives' proces adapted) is based on the same principle. It was used by Sir William Abney (1843-1920), the English chemist and educationalist. Abney was known for his researches in photographic chemistry and colour photography, and did important pioneering work in photographing the solar spectrum.

© National Museum of Science & Media / Science & Society Picture Library

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