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  1. Discussion of the magnetic and meteorological observations made at the Girard College Observatory, Philadelphia, in 1840, 1841, 1842, 1843, 1844, and 1845. By A. D. Bache.
    By: Bache, A. D. - Schott, Charles A. - Girard College.
    Publication info: Washington,Smithsonian Institution,1859-65
    Contributed by: University of California Libraries (archive.org)
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