Mr ROTHMANS OBSERVATIONS OF HALLEYS COMET. 



497 



One observation of the outer ring rejected, vmder circmnstanees 

 similar to those of Sept. 30. 



The Star is in Histoire Celeste, p. 208. a. Transit at 6' . 49'" . 48',5. 



The Star is 58 Telescopii Herschel. Position for 1810 according to 

 Groombridge, M = 7" . 7" • 30^5. N.P.D. = 44° . 26' . 52 ". 



The Comet to-night was extremely faint, and the instants of ap- 

 pearance and disappearance are little better than estimations. 



Ingress, 

 h. in. t. 



Comet 11.17. 55,4 

 Star 17 . 55,4 



Oct. 5. 

 Watch fast 5™. 47'. 



Egress. 

 I: m. I. 1 Inner Ring. 



11 . 21 . 25,4 I (hornet in tlie upj)ei' half: 

 20 . 53,6 J Star in tlic lower. 



They entered quite simultaneously. Tolerably good observation 

 the disappearance of the Comet may be marked a little too soon. 



