PROC. AM. PHILOS. SOC. 



VOL. XLIX. NO. 194 



Plate XX 

 West 



Comet 1907 d (Daniel) on August 20, 1907, at iS^^ 27-^ C.S.T. 



Exposure 1^ 5™. Scale : i inch - 53 



jo-inch Bruce Portrait Lens. Yerkes Observatory. 



