498 



Mr ROTHMAN'S OBSERVATIONS OF HALLEY'S COMET. 



Inner Rbig. 

 Star above : both in 

 the same half of 

 the field. 



One observation marked as doubtful in my journal has been re- 

 jected, though it agrees pretty well on being reduced. The Star is 

 Piazzi, VIII. 15. 



Star 

 Comet 



Ingress, 

 h. in. a. 



8 . 49 . 30,8 

 .'>3 . 1 ,6 



Oct. 10. 

 Watch fast 6"". 41^, 



Egress. 



8 . 51 . 14,4 

 55 . 20,8 



Inner Ring. 

 Comet in the upper half: 

 Star in the lower. 



Several comparisons were made with the outer ring this evening, 

 before the Comet approached sufficiently near the Star to admit of the 

 use of the inner ring. These have been rejected for reasons already 

 explained. 



k. m. s. 



The Star is in Groombridge JEl = 10 . 48 . 58,14 I f^j jgjo 



D = 25". 33'. 37" 



Ingress, 

 h. m. $. 



Star 12.5. 40,8 

 Comet 6.51,6 



Oct. 11. 

 Watch fast 6". 54'. 



Egress. 



h. m. I. ] Inner Ring. 



12 . 9 • 26,4 I Star in the upper half: 

 12 . 20,8 ) Comet in the lower. 



