Photo Jigsaw Puzzle of Spectroscope (c. 1860) by Bunsen and Kirchhoff, published in 1880
PHOTO JIGSAW PUZZLE. Photo Puzzle (252 Pieces). Artwork depicting Spectroscope (c. 1860) by Bunsen and Kirchhoff, published in 1880. Spectroscope by Robert Bunsen (German chemist, 1811 - 1899) and Gustav Robert Kirchhoff (German physicist, 1824 - 1884). A spectroscope is an optical device, with the light split into its spectrum and can be examined visually. Wood engraving, published in 1880. Shipping from America.