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University of Pittsburgh
Title
13" refractor
Date
ca. 1880-1900
Source
Allegheny Observatory Records, 1850-1967
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University of Pittsburgh
Title
Proposed designs
Date
ca. 1880-1900
Source
Allegheny Observatory Records, 1850-1967
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University of Pittsburgh
Title
Sunspot drawing
Date
ca. 1880-1900
Source
Allegheny Observatory Records, 1850-1967
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University of Pittsburgh
Title
Sunspot drawing
Date
ca. 1880-1900
Source
Allegheny Observatory Records, 1850-1967
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University of Pittsburgh
Title
Original Allegheny Observatory
Date
ca. 1886
Source
Allegheny Observatory Records, 1850-1967
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University of Pittsburgh
Title
Original Allegheny Observatory
Date
ca. 1886
Source
Allegheny Observatory Records, 1850-1967
thumb
University of Pittsburgh
Title
Original Allegheny Observatory
Date
ca. 1886
Source
Allegheny Observatory Records, 1850-1967
thumb
University of Pittsburgh
Title
Original Allegheny Observatory
Date
ca. 1886
Source
Allegheny Observatory Records, 1850-1967
thumb
University of Pittsburgh
Title
Original Allegheny Observatory
Date
ca. 1886
Source
Allegheny Observatory Records, 1850-1967
thumb
University of Pittsburgh
Title
Original Allegheny Observatory
Date
ca. 1886
Source
Allegheny Observatory Records, 1850-1967
thumb
University of Pittsburgh
Title
Original Allegheny Observatory
Date
ca. 1886
Source
Allegheny Observatory Records, 1850-1967
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University of Pittsburgh
Title
Original Observatory
Date
1886
Source
Allegheny Observatory Records, 1850-1967
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University of Pittsburgh
Title
Samuel P. Langley
Date
August 20, 1887
Source
Allegheny Observatory Records, 1850-1967
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University of Pittsburgh
Title
Allegheny high school
Date
ca. 1890-1910
Source
Allegheny Observatory Records, 1850-1967
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University of Pittsburgh
Title
208 club
Date
ca. 1890-1910
Source
Allegheny Observatory Records, 1850-1967
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University of Pittsburgh
Title
Death cell, Ohio State Penitentiary
Date
ca. 1890-1910
Source
Allegheny Observatory Records, 1850-1967
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University of Pittsburgh
Title
Grounds
Date
ca. 1890-1910
Source
Allegheny Observatory Records, 1850-1967
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University of Pittsburgh
Title
On Tennessee Pass
Date
ca. 1890-1910
Source
Allegheny Observatory Records, 1850-1967
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University of Pittsburgh
Title
Phipps Conservatory
Date
ca. 1890-1910
Source
Allegheny Observatory Records, 1850-1967
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University of Pittsburgh
Title
Picnic group
Date
ca. 1890-1910
Source
Allegheny Observatory Records, 1850-1967