Boy lighting paper using the sun's rays focused by a concave mirror. Engraving from ''Natural Philosophy'' by E. Atkinson, London, 1878.

- Image ID: E1GNRA
Boy lighting paper using the sun's rays focused by a concave mirror. Engraving from ''Natural Philosophy'' by E. Atkinson, London, 1878.
World History Archive / Alamy Stock Photo
Image ID: E1GNRA
Boy lighting paper using the sun's rays focused by a concave mirror. Engraving from ''Natural Philosophy'' by E. Atkinson, London, 1878.