10 BARNARD— PHOTOGRAPHIC OBSERVATIONS [April 25, 



star and was fairly distinct. The comet was a conspicuous object 

 to the naked eye. 



August 6. — With the naked eye the head was as bright as f Tauri. 

 Could trace the tail, which was conspicuous but not bright, as far 

 as Aldebaran, where it passed south of that star; it was neither 

 slender nor broad — and seemed to be straight. With the 40-inch 

 the nucleus was not stellar but was bright and yellowish. It was 

 blurred or ill defined in the direction of the sun — apparently spread 

 out — while on the opposite side (away from the sun) it was quite 

 definite wtih a darker space in the nebulosity. The head was much 

 larger than the field of view. In the finder, the tail stretched away 

 across the field. There was a sixth magnitude yellowish star in it, 

 about \° back from the head. There was no detail or structure in 

 the comet as seen in the 4-inch finder. The nucleus was about the 

 fifth magnitude and almost stellar. The tail was very slender. The 

 edges were soft and roundish — like a cylindrical or conical body. 

 It was very beautiful in the finder. 



August 8. — To the naked eye the tail seemed to be almost the 

 same as on the sixth and was not sensibly longer, but the head was 

 brighter. The comet was ^ magnitude brighter than t, Tauri and 

 about equal to 6 Aurigse. The sky was good. With the 40-inch 

 the measured diameter of the nucleus at 16'^ 7"^ was 2".49. This 

 gives a diameter of 2,580 miles. It was slightly yellow. There was 

 a sharp outline several minutes long nearly straight, which passed 

 the preceding edge of the nucleus and which bounded a much denser 

 nebulosity following, in which the nucleus was immersed. The 

 position angle of this definitely bounded nebulosity was i6o°.6 (i) 

 at 16^ 8™. In the finder the nucleus was stellar and bright. The 

 comet was still faintly visible with the naked eye at 16*^ 19™, but at 

 the limit of vision on the dawn-lit sky. 



August p. — Sky not very transparent. The tail was not so con- 

 spicuous as on the eighth; the head seemed brighter, however. It 

 could be faintly traced to a distance as great as that from ^ Tauri 

 to Aldebaran (16°). The head was somewhat less bright than 

 A Orionis. 



August 10. — Sky very good. To the naked eye the comet was 



