CHAP, v.] Her Sweepings. 147 



horizon through the Pleiades up as high as the head of 

 Medusa. Left off with /3 Tauri. Afterwards I continued 

 with horizontal sweeps till daylight was too strong for see- 

 ing any longer. 



1792. May Brd. My brother having desired me by way 

 of practice to settle the stars a Persei and Castor, and a Vir- 

 ginis, by some neighbouring stars in Wollaston's Catalogue, 

 I made last night an attempt to take their places. The 

 moon was near the full, therefore no sweeping could be 

 done. 



1795. May 1st. Mem. In the future when any great 

 chasms appear in my journals, it may be understood that 

 sweeping for comets has not been neglected at every op- 

 portunity which did offer itself. But as I always do 

 sweep according to the precept my brother has given me, 

 and as I often am in want of time, I think it is very im- 

 material if the places where I have seen nothing are noted 

 down. 



Nov. 7th. 0.40 sidereal time. About an hour ago I 

 saw the comet [seventh] which is marked in the annexed 

 field of view [diagrams drawn with extreme neatness illus- 

 trate the entries when necessary]. When I perceived it 

 first the two small stars were entirely covered \>y it, and it 

 appeared to be a cluster of stars mixed with nebulosity ; 

 but not knowing of such an object in that place, I kept 

 watching it, and perceived it to be a comet by its having 

 moved from the two small stars, so as to leave them en- 

 tirely free from haziness. 



1797. Aug. I4tk. C. H.'s comet. At 9.80 common 

 time, being dark enough for sweeping, I began in the usual 

 manner with looking over the heavens Avith the naked eye, 

 and immediately saw a comet nearly as bright as that which 

 was discovered by Mr. Gregory, January 8, 1793. I went 

 down from the observatory to call my brother Alexander, 



L 2 



