PROC. AM. PHILOS. SOC. 



VOL. XLIX. NO. 194 



Plate XVI 

 West 



Comet 1907 d (Daniel) on August 14, 1907, at 151^ ii'" C.S.T. 



Exposure i^^ 20™. Scale : i inch = 53' 



lo-inch Bruce Portrait Lens. Yerkes Observatory. 



