The Periodometer: An Instrument for Finding and Evaluating Periodicities in Long Series of Observations By C. G. Abbot Books / Paperback Science, Technology, Engineering, Mathematics › Science Publisher: The Smithsonian Institution, January 1932 Price $16.42 Free Shipping Send to a friend Used - Acceptable Acceptable condition. Smithsonian Miscellaneous Collections, Vol. 87, No. 4. (Solar Radiation, Periodometer) A readable, intact copy that may have noticeable tears and wear to the spine. All pages of text are present, but they may include extensive notes and highlighting or be heavily stained. Includes reading copy only books. $16.42 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store.