4i Mr. Hersctjei/s Catalcguc 



lide of the hndt-r. The naked eye then wiH immediately direct 

 us, by means of the two ftars juft mentioned, towards the 

 place where, in the finder, the armed eye will perceive the 

 double flar in queftion about | degree from the 44th Lyncis. I 

 need hardly obferve, that we muft recollect the inverlion of the 

 finder, as thofe who are in the habit of uling telefcopes with 

 high powers, always furniihed with inverting finders, will of 

 courfe look for the fmall flar in the upper part of the field, as 

 in fig. I. 



At the 45th flar, in the firfl clafs, the defcription fays, 

 " About 1 1 degree f. preceding ^, towards 1 Aurigae.'* This 

 double flar will accordingly be found by placing ^ Aurigse firft 

 into the center of the finder; then, drawing the telefcope 

 towards /, which the naked eye points out, the ftar we look for 

 will begin to appear in the circumference as foon as ^ is about 

 I degree removed from the center, as in fig. 2. 



It will fometimes happen, that other flars are very near 

 thofe which are thus pointed out, that might be miftakeii for 

 them. In fuch cafes an additional precaution has been ufed by 

 mentioning fome circumftance either of magnitude orfituation, 

 to diilinguifh the intended flar from the reft. After all, if any 

 obferver fhould be ftlU at a lofs to find thefe ftars without having 

 their right afcenfion and declination, he may furnifh himfelf 

 with them by means of Flamsteed's Atlas Cceleftis ; for my 

 defcription will be fafficiently exadl for him to make a point in 

 the maps to denote the ftar's place; then, by means of the gra- 

 duated margin, he will have its J^ and declination to the time 

 of the Atlas, which he may reduce to any other period by the 

 ufual computations. 



Before I quit this fubje£l I muft remark, that it will be found 

 on trial, that this method of pointing out a double ftar is not 



only 



