PROC. AM. PHILOS. SOC. 



VOL. XLIX. NO. 194 



Comet 1907 d (Daniel) on July 17, 1907, at 13'' 59™ C.S.T. 



Exposure 2^ 10™. Scale: i inch = 50' 



lo-inch Bruce Portrait Lens. Ycrkcs Observatory. 



