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Acknowledgements

Introduction

Summary

Nominations

Other Sites

Existing National Historic Landmarks

Glossary





Astronomy and Astrophysics
Allegheny Observatory
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Allegheny Observatory


telescope
Allegheny Observatory — Pittsburgh, Pennsylvania.
31-inch Fitz-Clark Reflector, 1988.
(Photo Credit: Allegheny Observatory)

plate collection
Allegheny Observatory — Pittsburgh, Pennsylvania.
Plate Collection (112,000 to date), 1988.
(Photo Credit: Allegheny Observatory)

Brashear crypt
Allegheny Observatory — Pittsburgh, Pennsylvania.
Crypt, 1988.
(Photo Credit: Allegheny Observatory)

Keeler crypt
Allegheny Observatory — Pittsburgh, Pennsylvania.
Crypt, 1988.
(Photo Credit: Allegheny Observatory)


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