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Glass positive:- Jupiter

Glass positive:- Jupiter

1915
Glass positive:- Saturn

Glass positive:- Saturn

1909-1921
Glass Positive:- Halley's Comet

Glass Positive:- Halley's Comet

1910
Glass positive:- Jupiter

Glass positive:- Jupiter

1917
Comet, 1910 I. (Daylight) V.M. Slipher

Comet, 1910 I. (Daylight) V.M. Slipher

1910
Photograph showing Titanum Oxide spectrum, compared with the banded Spectrum of the Third type stars, as represented by Omicron Ceti in glazed frame. I. Spectrum Omicron Ceti ( Slipher), II. Spectrum of TI Oxide (Fowler).

Photograph showing Titanum Oxide spectrum

1911
Glass positive:- Halley's comet, V.M.Slipher, Lowell Observatory 1910, May 7, Exposure 24 min, 6 1/2" x 8 1/2"

Glass positive:- Halley's comet

1910