
Glass positive:- Spectroheliogram

Glass positive:- Spectroheliogram, K, bright filaments, T.Royds Kodaikanal Observatory, South India, 1926, February, 22d 9h 0m, 10"x10"
Glass positive:- Spectroheliogram, K, bright filaments, T.Royds Kodaikanal Observatory, South India, 1926, February, 22d 9h 0m, 10"x10"