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Acer palmatum, although there are more than 100 species of maple worldwide, only one species (Acer campestre) is native to the UK.

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Sketch of planet conjunctions

Sketch of planet conjunctions

Catalogue number: WP1/2/84

Diagram by Wallace of the relative positions of Earth, Venus and Jupiter during March 1892, sent with a letter dated February 1892.

Sketch of planet conjunctions (extract)

Image showing an extract from this item

This is a diagram, drawn by Wallace, of the 'position of Earth, Venus and Jupiter when the two planets are seen near together'. Three circles represent the orbits of each planet. Wallace notes that 'Jupiter revolves in 12 years, Venus in 8 months'. By 'revolves' he means the time taken to orbit the sun. Wallace enclosed this diagram with a letter to his daughter Violet.

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Wallace Letters Online

Letter to Alfred Russel Wallace from the Royal Society, about his Darwin Medal award

View high resolution scans and transcripts of Alfred Russel Wallace's correspondence, including all surviving letters between him and Charles Darwin.

Explore Wallace's correspondence