Daily: 10 A.M.–5 P.M.
Closed on Tuesdays
1151 Oxford Road
San Marino, CA 91108
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Additional Formats
[A. J. Haagen-Smit; F. T. Haddock; George Ellery Hale; John S. Hall {incl c.ltr JSH to DHSadler; ltr ISB to JSH, LGHenyey, & AEWhitford}; Guillermo Haro {incl c.ltr GH to BHRule; c.ltr LPlaut to GH}; R. G. Harrington; George R. Harrison {incl c.ltr HWB to GRH}; Harshaw Chemical Company; Harvard College Observatory; Takeo Hatanaka; H. LAwrence Helfer {c.ltr HLH to JLGreenstein; c.ltr JLGreenstein to HLH; note OCWilson to ISB}; Louis G. Henyey]
Bowen
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Additional Formats
[John Hall; John S. Hall {incl c.ltr JSH to WABaum}; Alexandre Halst; David W. Hamlin; James N. Hanson {c.3 ltrs HWB to JNH}; Kenneth V. Hardman {H. V. Hardman, Inc}; Eugene A. Harlan; Hawaii Pacific Homes {Oscar L. Fulford--re JCDuncan}; Otto Heckmann; Hemisphere {R. J. Maguire}; Louis Henyey {re OStruve; RJChambers}; Paul Herget{re SBNicholson}; R. Herman]
Bowen
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Additional Formats
[Gilbert P. Haight, Jr.; Evelina C. Hale; John S. Hall; Marshall Hall, Jr.; Lansing V. Hammond; Robert Hardie; Guillermo Haro; Richard A. Harvill; Clinton Hawes; John F. Heard {incl c.ltr HWB to JFH}; Osborne O. Heard; O. Heckmann; Donald O. Hendrix; Karl G. Henize {incl c.ltr HWB to KGH}; Merlyn C. Herrick {incl ltr MCH to WCMiller}]
Bowen
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Additional Formats
[Melvin D. McCord {folded}; Robert L. McGlasson; Andrew McKellar {incl c.ltr BHRule to AM; c.2 ltrs AM to BHRule; 1 photo}; Dean B. McLaughlin; The Macmillan Co. {Susan S. Prink}; D. H. McNamara; G. C. McVittie {c.ltr GCM to WHPickering}; David Alan Mann; Abraham Marcus; William Markowitz; Sister Mary Generode, O.S.F.; John Mathis; Thomas A. Matthews {incl c.ltr LAD to TAM}]
Bowen
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Additional Formats
[John S. Hall {c.ltr JSH to John Irwin}; Robert Hardie {c.ltr WABaum to RH}; Emerson Hartong {ltr of passage ISB}; Sherwood K. Haynes; John F. Heard {folded}; George H. Herbig; Byron Hill {incl ltr MtWilson & Palomar staff to ISB}; W. A. Hiltner {c.ltrs BHRule to WAH}; W. G. Hingston; Arthur R. Hogg; Holiday {Carl L. Biemiller}; Erik Holmberg; Ralston Holmes; J. Hopmann; Fred Hoyle; Edwin P. Hubble; C. M. Huffer; Milton L. Humason]
Bowen
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Additional Formats
[Y. Hagihara {incl ltr Hiroshi Kubota to ISB}; Leo Hanzione; Guillermo Haro; Daniel E. Harris; Harvard College Observatory; The Haskin Service {M. Goodrich}; Gerald S. Hawkins; C. H. Hayslett; H. Lawrence Helfer {incl c.ltr LAD to HLH}; Donald O. Hendrix {incl c.ltr DOH to Edwin F. Carpenter}; Barklie McKee Henry; C. J. Heyboer {folded}; Hall L. Hibbard]
Bowen