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PagePlateClassObjectR.A.DecStartObs H.A.Obs DecStopExpDateMiscellaneous
4216852α Lyrae12 126 21 E+30.812 23May 13 1907x 16852 Isochromatic Plate. Spectra through piece of didgmin glass in contact with film.
4216853α Lyrae12 3112 54May 13 1907x 16853 Same as last. Changed load to 500 grams for a few minutes & then changed back.
4216854α Lyrae13 0913 21May 13 1907x 16854 Ordinary plate without screen.