PROC. AM. PHILOS. SOC. 



VOL. XLIX. NO. 194 



Plate XXV 

 West 



Comet 1907 d (Daniel) on September 8, 1907, at i6i' 17"! C.S.T. 



Exposure o'^ 5™. Scale : i inch = 90' 



6%-inLli J->nicc I'artrail Lciis. ]'crlccs Obscrz'atory. 



