Pritchard's Wedge Photometer (Hardcover) (ISBN-13: 9781020582882)

This seminal work by Charles Augustus Young, Edward Charles Pickering, and Samuel Pierpont Langley describes the design and operation of a photometer for measuring the brightness of stars. With detailed diagrams and explanations, this volume is a foundational text for anyone interested in the study of astronomy.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.

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