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Spectra (4): undated

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Spectra (5): undated

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Puppis - Spectrum 3923-4505: undated

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Hydrogen-No Leyden (20): undated

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Photographic experiment: undated

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Sun and Air: undated

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Solar spectrum (11): undated

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Enlarged copy of solar spectrum (6): undated

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Solar spectrum with comparison (35): undated

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Solar consparison spectrum (12): undated

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Solar spectrum with comparison spectrum (20): undated

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Coal gas laboratory spectrum (23): undated

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Canis Minoris D2204 (5): undated

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Leyden (24): undated

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D2205 (5): undated

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Photographic experiment: undated

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Solar? spectrum "D660" (3): undated

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Solar? spectrum (6): undated

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Objective prism plate (4): undated

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Objective prism plate (7): undated

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Objective prism plate-probably Pleiades (8): undated

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Objective prism plate (9): undated

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Objective prism plate-star field (10): undated

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Objective prism plate (11): undated

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