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VI. Catalogue of Double Stars, 

 By William Herfchel, Efq, F, R, S. 



Read December 9, 1784. 



INTRODUCTORY REMARKS. 



THE great ufe of Double Stars having been already pointed 

 out in a former paper, on the Parallax of the Fixed Stars, 

 and in a latter one, on the Motion of the Solar Syftem, I have 

 now drawn up a fecond coUedion of 434 more, which I have 

 found out fmce the firfl was delivered. 



The happy opportunity of giving all my time to the purfuit 

 of aftronomy, which it has pleafed the Royal Patron of this 

 Society to furniih me with, has put it in my power to make 

 the prefent colledion much more perfedl than the former; 

 almofl every double ftar in it having the diftance and pofition 

 of its two flats meafured by proper micrometers ; and the 

 obfervations have been much oftener repeated. 



The method of claffing them is in every refped the fame as 

 that which has been ufed in the firfl: collection ; for which rea- 

 fon I refer to the introductory remarks that have been given 

 with that coUedion * for an explanation of feveral particulars 

 necefTary to be previoufly known. The numbers of the flars 

 are here alfo continued, fo that the firfl clafs ending there at 



♦ See PhilofophicalTranfaaions, vol. LXXII. p. 112. 



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