Memoirs . North North Memoirs American Academy of Arts and Sciences. Vol. XIV. No. IV. PLATE IX R and S SCORPII 16 , -22 4(1 (1900)Yerkes negative, 1908, April 5. Scale, 1 mm = 20 5 h m Z SAGITTARII 19 1, -21 7 (1900)Yerkes negative, 1907, Sept. 11. Scale, 1 mm =

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