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A brass spectroscope or spectrometer with three scopes and central prism; image credit on full record. |
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The scaled base; image credit on full record. |
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The brass spectroscope or spectrometer with three scopes and central prism; image credit on full record. |
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The central prism; image credit on full record. |
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The y-shaped foot; image credit on full record. |
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The prism; image credit on full record. |