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EDMOND HALLEY AND HIS TIMES SIR H SPENCER Jones 2
THE UTILITY OF METEORS HARLOW SHAPLEY
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activity Adams Airy American angle appear astronomical atmosphere August beginning brightness called comet complete computed continued course crater cycle determine direction discovery distance early earth eclipse effect error evidence fact fall field FIGURE give given granulation important indicated interest July June known later latitude less light lines longitude magnitude March maximum mean measure meeting meteorite meteors miles Miss month moon morning motion Mount moving nature Notes object observations Observatory obtained occur October orbit origin period photographic planet position possible present probably Professor published reached recorded reports seems seen Society solar stars sunspot surface tables taken telescope theory tion trail Tycho Brahe United University variable visible Yerkes