3) ISB at A. A. Michelson exhibit, US Naval Ordnance Test Station, Inyokern, California, (1)

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  2) ISB looking up at 200" mirror cell (1 + 1 negative)

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  6) Color print of ISB and others at Santa Barbara Street, (1)

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  4) ISB (top) & unknown person at 200" coudé spectrograph (1 + 1 negative)

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  60-Inch [Palomar] Tests [#3]

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