Daily: 10 A.M.–5 P.M.
Closed on Tuesdays
1151 Oxford Road
San Marino, CA 91108
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Additional Formats
[George H. Herbig {incl c.ltr GHH to BHRule; c.ltr BHRule to GHH}; Donald G. Herold; Byron A. Hill {incl c.ltr WABaum to BH}; W. A. Hiltner {incl c.ltr WAH to HWBabcock}; Frederick Hilton; Arthur A. Hoag; J. G. Hopewell; Erich Hösel; T. E. Houck; Robert F. Howard; Guillermo Hoxmark; Glen Hughes; Milton L. Humason; Hunter Films Limited {P. Darvill}; J. Allen Hynek]
Bowen
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Additional Formats
[Grace Hawk; Walter S. Heller; Donald O. Hendrix; Joseph Q. Heplar; George H. Herbig; Paul Herget; Samuel Herrick, Jr.; Hilger & Watts, Ltd. {J. W. Perry}; Byron Hill; W. A. Hiltner {incl c.ltr BHRule to WAH; c.ltr WAH to BHRule}; Edison R. Hoge; A. R. Hogg; Leo Hollenberg; Alice W. Hood; Hubert V. Hopkins; Inga Howard; Edwin P. Hubble; Grace Hubble; Milton L. Humason; W. S. Huxford; J. A. Hynek]
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
[Arne Slettebak; E. C. Slipher {incl c.ltr WABaum to ECS}; Michael S. Snowden; South African Embassy; F. M. Speed; H. S. Spigl; Jonathan M. Spivak; E. V. Stearns {Astronautical Sciences Review}; Cynthia Stephens {incl 2 ltrs ISB to JSchilt; 2 ltrs JSchilt to ISB}; C. B. Stephenson]
Bowen
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Additional Formats
[Emil R. Herzog {incl c.ltr WABaum to ERH}; W. A. Hiltner {incl c.report "Spectrographic Experiments with Image Converters at the 100-Inch Telescope," by WABaum + photo}; Hoikusha Publishing Co., Ltd. {H. Murakami}; Horizons of Science {Bert Shapiro}; J. Houtgast {incl ltr MMinnaert to ISB; c.2 ltrs MMinnaert to RRMcMath; ltr RRMcMath to ISB; c.ltr RRMcMath to MMinnaert; ltr ISB to RRMcMath; c.ltr JH to Walter S. Mitchell, Jr.}; Léo Houziaux; Humble Touring Service; Alan Hunter; Max W. Hunter {c.ltr AJDeutsch to MWH}]
Bowen
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Additional Formats
[John S. Hall; Richard T. Hansen; Guillermo Haro {incl c.ltr RMinkowski to GH}; Harvard College Observatory; Roger Harris; George R. Harrison {incl ltr VBush to ISB; c.2 ltrs HWBabcock to GRH; c.2 ltrs GRH to HWBabcock}; D. S. Heeschen {AURA}; Erich P. Heilmaier K.; H. Lawrence Helfer; C. T. Helstrom]
Bowen