
Glass positive:- spectroheliogram

Glass positive:- spectroheliogram, H and Bright filaments, T.Royds, Kodaikanal Observatory, South India, 1926, February, 22d 8h 36m, 10"x10"
Glass positive:- spectroheliogram, H and Bright filaments, T.Royds, Kodaikanal Observatory, South India, 1926, February, 22d 8h 36m, 10"x10"