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Start Over You searched for: JOHN Remove constraint JOHN Media Type Objects Remove constraint Media Type: Objects Collection Robert B. Ariail Collection of Historical Astronomy Remove constraint Collection: Robert B. Ariail Collection of Historical Astronomy

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1. John Browning spectroscope

2. John Byrne tripod saddle

3. John Brashear 3.5 in. refractor

4. Dollond micrometer

5. Dolland 1.75 in. refractor

6. Dollond 2.75 in. refractor