232 -GERARDI REGNERI FOCKENS 



« ihe effecl oF an uncertainly in Ihe maximum of aberration , amounting only (o { of a 

 « second, will have a sensible effect. 



Transit ad suas dislaniiarum zenithalium observaiiones, 



1.) Cygni «. 



« Summer zenilh-distance, Jan. 1 , 1815. 



1811 , 1812, 23 observ. 8^ 45' 45 ',71 + 0,74p 



1814 10 45, 97 + 0,7-J.p 



1815 20 46, 12 + 0,43/? 

 1817 14 45, 22 + 0,68j» 



«Winter zenith-distance, Jan. 1, 1815. 



1810 - 1813 24 obsery. 8' 45' 47",12 — 0,76/» 



1814 — 1815 12 46,79 — 0,80)» 



1816 - 1817 16 46, 57 — 0,76/> 



8° 45' 46",86 — 0,77/> = 8' 45' 45",77 + 0,63p 



1 09 

 und« : p = T^ = 0",78 2p := 1", 56 ex 119 observationibus. 



qui est angulus sub diametro orbitae terrestris in Stella subteusus. 

 2.) Aquilae «• 



« Summer zenith-distance, Jan. 1 , 1817. 



1808—1812 38 observ. 44° 59' 36",38 + 0,38/> 



1814 21 36,92 + 0,21/» 



1815 — 1810 22 36,10 + 0,30;» 



1817 25 36, 54 + 0,26p _ 



« Winter zenith-distance, Jan. 1, 1817. 



1808—1812 38 observ. 44° 59' 38",51 — 0,40/» 



39, 20 — 0,47/» 

 38, 36 — 0,45/» 

 37, 57 — 0,44/» 



44° 59' 36",47 + 0,30p = 44° 59' 38",38 - 0.44/» 



1 89 

 unde: p = gy, = 2",53 2p = 5",0 ex 208 observationibus. 



3.) Ly- 



