VOL 1 & 2 1912 STUDY OF REVERSIBLE PENDULUM, J SHEDD & J BIRCHBY, author Signed
VOL 1 & 2 1912 STUDY OF REVERSIBLE PENDULUM, J SHEDD & J BIRCHBY, author Signed
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Description
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Old Antique Booklets titled; "A Study of the Reversible Pendulum Part 1.  Theoretical Considerations" by John C. Shedd and James A. Birchby.  Part 1 is signed by the author, "J. Arthur Birchby".  Also, "A Study of the Reversible Pendulum Part 2. Experimental Verifications" by John C. Shedd and J. A. and W. N. Birchby.  Paper booklets contain 18 and 13 printed pages.  Size is about 7" x 10".  paper covers.  Condition: soiling and foxing spots, occasional edge wear and tears.  covers on part I are beginning to separate at the spine.
covers on part II are missing.  Please see scans for additional condition review. 
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