I'ROC. AM. PHILOS. SOC. 



VOL, XLIX. NO. 194 



Plate XIII 



West 



Comet 1907 d (Daniel) on August 11, 1907, at 14^ S9^ C.S.T. 

 Exposure i'' 42"'. Scale : i inch = 129' 



3.4-iiich Bruce Portrait Lens. Yerkcs Observatory. 



