SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE, VOL. XXXIV. 



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PLATE XXV. 





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CLAV1US, LOXGOMOXTANUS, TYCHO, ETC. PHOTOGRAPHED BY RITCHEY, NOVEMBER 21, 1901, > 

 SEVEN HOURS, THIRTY-TWO MINUTES P. M., CENTRAL STANDARD TIME. 

 SCALE, THREE-FOURTHS METER TO MOON'S DIAMETER. 



