Heliograph, sunshine recorder. Made by Brady and Newton of Newcastle. sun burns holes in the card behind the sphere, showing the intensity

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Heliograph, sunshine recorder. Made by Brady and Newton of Newcastle. 1890s. The sun burns holes in the card behind the sphere, showing the intensity of the light by the differing sizes of burn.

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Size: 3744px × 5616px
Photo credit: © © chrisstockphotography / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 24, ball, brady, brunholes, burns, card, chart, charting, crystal, days, glass, globe, graph, heliograph, holes, hours, intensity, light, marks, newcastle, newton, northumbria, sphere, sun