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ftars acrofs the plane of the fe61or, which was mei^tioned 
before. The fe6lor being put up with its plane( facing 
the Weft, and fet near the meridian by the variation 
compafs, allowing for the variation, I found, by the 
tranlit of o Draconis, on the North lide of the zenith, 
compared with thofe of i and d Gygni on the South 
fide, that the inftrument deviated 49^ minutes to the 
Weft of the South in azimuth; which being corre6ted, 
by turning the inftrument about on its vertical axis, 
towards the Eaft, by the help of the diviftons on the azi- 
muth circle ; I then found, by the tranftt of n Cephei, 
on the North ftde of the zenith compared with that of 
7: Cygni on the South ftde, that the inftrument deviated 
feven minutes to the Eaft of the South in azimuth, which 
1 correcfted accordingly. And fo near was it brought to 
the meridian in this manner, that by the moft exacft com- 
parifon of the tranftts of feveral ftars on the 7 th and 8 th 
inftant, it appeared to be only two minutes out of the 
meridian,, and that to the Eaft of the South ; which fmall 
error I alfo attempted to correcft; but the inftTument 
refted one minute out of the pofttion which I intended 
to give it, owing to the difficulty of turning it about to 
fuch great nicety, and fo I let it remain. 
It was indeed a moft fortunate circumftance, that I thus 
got the inftrument fo near the. meridian by the very firft 
night’s obfervations, thofe of September 4th; forthebad- 
nefs of the weather inthe day prevented me from getting a 
meridian line by the Sun till the 1 5 th. Had I therefore been, 
obliged to v/ait for fettingthe inftrument right by the Sun, 
I ftiould. 
