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Filtering by: Collection Lick Observatory photographs Creator Mathews, H. E. Topic Refracting telescopes

$36-inch refractor, the "Great Lick Refractor": detail of the supporting pier$

$Filar micrometer for the 36-inch refractor$

$36-inch refractor, the "Great Lick Refractor": micrometer (duplex micrometer)$

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