Manuscripts
C -- Miscellaneous
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H -- Miscellaneous
Manuscripts
F. H. Hagner [Position Finder Corp.] (7); Charles E. Hall (2); Hanovia Chemical & Manufacturing Co. (1); Hartford, Connecticut, Board of Education (1); Samuel G. Hefelbower [much re Carthage College] (18); Bernard Clifford Hendricks (5); [?] Henson (1); Samuel G. Hibben [Westinghouse Lamp Co.] (2); Edgar Higgins (2); W. J. Hitchcock (4); Holmes Projector Co. (2); John M. Howie (4); The Huntington Library (1)
mssPettit papers
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C -- Miscellaneous
Manuscripts
Jean Cabannes (2); Walter Guyton Cady (1); California Crushed Fruit Co. (2); California Institute of Technology [John August Anderson] (1); E. Calzavara (2); James McKeen Cattell [re search for Secretary of the Smithsonian] (1); Randolph M. Cermak (3); J. W. D. Chesney (1); Sam M. Clark (2); Mrs. William Weber Coblentz (1); Collier's (2); Corning Glass Works (2); J. W. Crabtree (2); A. C. D. Crommelin (2)
mssPettit papers
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C -- Miscellaneous
Manuscripts
Walter Guyton Cady (2); Edwin Francis Carpenter (1); Central Scientific Co. (4); Major E. B. Colladay [re plans for Eclipse expedition to Fort Rosecrans] (2); Corning Glass Co. (9); Clifford Charles Crump (4); Leland E. Cunningham (1)
mssPettit papers
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C -- Miscellaneous
Manuscripts
Calexico Engineering Works (1); California Institute of Technology [re Edna Carter] (2); John William Campbell [includes letter from Ernest Sydney Keeping to E.P.] (3); Leon Campbell (8); Robert M. Campbell [a.k.a. Roupert Rivierre] (5); Carnegie Institution of Washington [includes letters re Exhibit Committee & from V. Bush] (7); Tommy Cave (2); Alvan Clark & Sons Co. (1); Columbia Broadcasting System (1); Consolidated Book Publishers (1); Heber Doust Curtis [copy letter to G. V. Krishnaswami] (1)
mssPettit papers
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A -- Miscellaneous
Manuscripts
Charles Greeley Abbot (17); Walter Sydney Adams (1); Robert Grant Aitken (4); Allyne & Ward (2); American Astronomical Society [Joel Stebbins] (9); Clifford N. Anderson [includes typed manuscript "Correlation of Radio Transmission with Ultra-Violet Radiation and Ozone"] (4); Arrowhead Springs Corp. (1); Atlantic Photo-Co. (3); L. d'Azambuja (2)
mssPettit papers
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H -- Miscellaneous
Manuscripts
Asaph Hall, Jr. (1); L. R. Hafstad (1); Herbert A. Hamm (1); Hanovia Chemical & Manufacturing Co. (23); R. I. Harris (1); Gilbert Havens (2); Earnest W. Hawkes (2); Fred H. Heath (1); Bernard Clifford Hendricks (1); Adam Hilger, Ltd. (1); Leonard Hill (2); Thorfin Rusten Hogness (3); Mrs. C. I. W. Hollister (2); William James Hooper (4); Frank E. Howard (4); William Franklin Hoyt (18); Blythe Hurst, Sr. (6)
mssPettit papers