«- .MA0nJ^/I<JiST/5U YLENBROEK 



"^ Porro CG^ = CD* - GD^, CH« = CB« — HB* 



i. c. CG*= r* — *^%CIi2= r2 — |/>* 

 , .. ergo.CG* — CH' = r* — |y» — r* + tp* 



= ♦/ - iq^ 

 = *(/-*-?*> 



est autem CG*— CH» = (CG + CH) X (CG — CH) 

 ergo (CG+CH) X (CG-CH) = *(/.«_^*_) 



wt au^m ,CQ = / ( CG + CH ) + K CG — CH > 



CG« = r^ — iq^ 

 sivc r» = CG* + i^ i 



= (f-^T+ ^^^ + *^- + »'' 

 = («^Y+ '-^ + i'' + »'• 



Haec methodus inveniendi campum micrometri circularis ex datfs Declinationibus diio« 

 rum astronim primum a CI. Fixmillner proposita , dein a Celeb. Iviistner in Aaron. 

 Jahrb. A. 1796. p. 164. fuit repecita. 



Si in formula (B) facias /> = «,?=«',* = >'-? at per 4 multiplicaveris, ha. 

 bebls : 

 ft * . . ?. . 



