Photo-engraving from a photograph of sun spots
- maker:
- Warren de la Rue
Photo-engraving from a photograph of sun spots, taken by Warren de La Rue with a 13-inch equatorially mounted reflector at his observatory at Cranford, Middlesex.
Photo-engraving from a photograph of sun spots, taken by Warren de La Rue with a 13-inch equatorially mounted reflector at his observatory at Cranford, Middlesex.
