S ? Mr , H £ R »c H E L* s Calalog ue 



III. To call It, probably tinges them too deeply, Diflance 

 with 278, 12'' 3V"; with 625, iz" 23"^ Pofitioa 

 50° m' Vi. preceding. 



104. Fl. 83^"" Herculis prasccdens. 



JNiar. 26, Double. About I degree preceding the 83 ; the fe- 

 1783. cond ftar towards the 79th Herculis. Very unequal. 

 L. r. ; S. darker n Dlftance 14''^ 2o''\ Pofition 83^ 

 48^ n. preceding. 



105. y (Fl. 12^) Sagittje borealior et prascedens. 



April 7, Double. About 2^ preceding the double ftar V. 106. 

 1783. Pretty unequal. L. r. ; S. d. Diftance 14^^29^^^; 



very inaccurate, on account of obfcurity. Pofition 



50° 24^ f. preceding. 



106. Fl. 5 Serpentis. 



May 21, Double. Excefiively unequal. L. rw. ; S. db. Too 

 1783* oblbure for mealures. Of the third clafs, far. Pofi- 

 fition about 30'' or 40^ n. following. 



107. Congerie Stellularum Sagittarii borealior. 



June 6, Double. Above i \ degree n. of the 20th clufter of 



•1783. ftars of the Connoijfance des l^emps, in a line parallel 



to y S'agittarii and the clufler : the moft fouth of many, 



Confiderably unequal. Diftance with 278, 15'^ lo^^^ 



As accurate as the prifmatic power of the atmofphere, 



which lengthens the flars, will permit. Pofition 54^ 



48'' f^ preceding*. 



108., 



* What 1 call the prifmatic power of the atmofphere, of which little notice 

 has been taken by allronomers, is that part of its refradive quality whereby it 

 ilifperfes the rays of light, and gives a lengthened and coloured imqge of a lucid 

 point. It is very vifible in low flaps; Fomalhand, for inftance, affords a beau- 

 tiful prifmatic fpedrum. That this power ought not to be overlooked in delicate 

 4 and 



