Caption:
A diagram of the Earth's annual orbit around the Sun, showing the "theory of the seasons." Coloured engraving by J. Emslie, 1851. One of a set of hand-tinted astronomical prints with an explanatory card. The publisher is identified on each print as J. Reynolds or James Reynolds of the Strand, London. These cards were first issued by Reynolds in 1846, although he and other publishers continued to produce them throughout the second half of the 19th century. They responded to a perceived market for popular science products and were intended for informal learning within the home.