. The Adolfo Stahl lectures in astronomy, delivered in San Francisco, California, in 1916-17 and 1917-18, under the auspices of the Astronomical Society of the Pacific. SAN FRANCISCO1 01E> i^kinted for the sociexyBy the Sta^nkord University Press. Copyright, 1919, byThe Astronomical Society of the Pacific 51?1^44 DEDICATION TO MY ILLUSTRIOUS FRIEND, MANUEL ESTRADACABRERA, THESE LECTURES ARE DEDICATED. ASPRESIDENT OF THE REPUBLIC OF GUATEMALAHIS LOFTY AIM HAS BEEN TO RAISE THE STAND-ARD OF EDUCATION AND LITERARY ACHIEVE-MENTS. HIS ENERGY HAS BEEN DEVOTEDWHOLEHEARTEDLY TO ESTABLISHING SCHOOLS


. The Adolfo Stahl lectures in astronomy, delivered in San Francisco, California, in 1916-17 and 1917-18, under the auspices of the Astronomical Society of the Pacific. SAN FRANCISCO1 01E> i^kinted for the sociexyBy the Sta^nkord University Press. Copyright, 1919, byThe Astronomical Society of the Pacific 51?1^44 DEDICATION TO MY ILLUSTRIOUS FRIEND, MANUEL ESTRADACABRERA, THESE LECTURES ARE DEDICATED. ASPRESIDENT OF THE REPUBLIC OF GUATEMALAHIS LOFTY AIM HAS BEEN TO RAISE THE STAND-ARD OF EDUCATION AND LITERARY ACHIEVE-MENTS. HIS ENERGY HAS BEEN DEVOTEDWHOLEHEARTEDLY TO ESTABLISHING SCHOOLSOF EVERY DESCRIPTION EVEN IN THE REMOTESTPARTS OF HIS COUNTRY; LEARNING OF ANYTYPE WHATSOEVER HAS AT ALL TIMES HAD HISUNLIMITED SUPPORT. TO WHAT MORE DESERVINGPERSON, THEREFORE, COULD ANY LECTURESWHICH HAVE AS THEIR OBJECT THE DIFFUSIONOF KNOWLEDGE, BE PRESENTED? cZ^C^^^^X^ PREFACE From the time of its organization in 1889, the chief objectof the Astronomical Society of the Pacific has been to stimu-late interest in astronomy among the people of the Pacificregion by giving to discoveries and advances made in that sci-ence the widest publicity through the medium of its Publica-tions and, more directly, by means of public lectures. In har-mon


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Keywords: ., bookcentury1900, bookdecade1910, booksubjectastronomy, bookyear19