C +90 ] 
Oblervations of the 0,5, and *’s palling the Meridian, made with a Transit 
Inftrument, the length of the Telefcope 4 feet, having 2 Objedt Glafics, 
and magnifying 50 times. 
1769 
Sept. 
— 21 The tranfit inftument, fent by the Royal Society, was brought to Cavan. 
Began to fat up the faid inftrument. 
Examined the line of coilimarion of the tranftt inftrument, and found it very much out, 
Brought it very near, and found the level very good. 
5 — 25 
? — 2c 
h— 3C 
Oct. 
O— 1 
Brought the line of collimation quite esaft <(by many trialsjl, ufing a diftandt objeft 
at the diftance of about two miles. 
At noon cloudy ; in the evening it began to clear. 
January i, 1750, the mean AR. of the Pole-* = 
Annual precef. 158'' then the precef. to this time rr 
Aberration in A.R. 
Nutation in A. R. 
Appt. A. R. the 2d of Oftober 1769. 
Clock too flow for fidereal time by the observations \ 
of a. Cygni made on the 30th of Sept. / 
Clock lofes in the interval of time between an 
C) gni’s palling the meridian and pole 
10 
+ 
+ 
-i 
42 37 
C2 OO 
8 34 
1 30 
11 44 41 o 46 59 
— 56 27 
— 04 
Pole tranftts the meridian, O&ober 2d, at 23 30 28 by the clock. 
At this inftant of time (hewn per clock, I brought the middle wire to bifedb the Pole 
, and after took the paflage of the following %*s over the meridian. 
‘ -[Time per clock 
5th wire 
I ft wire ’ 2J wire 
of palling the me- 
ridian. 
26 
6 
46 
38 
10 + 
54 § 
7 
24— 
4th wire 
Aldebaran 
Rigel 
x Orion 
Syrius 
Note, Juft before I brought the wire to the pole , I fet the axis of the tranfit inftrument horizontal by'the level ; 
and at j* 1 51', I examined it again by the level, and found it very exadt. In the morning I placed a mark in the 
meridian about ^ of a mile North, and took particular notice what natural marks the middle wire cut on the fummiti 
of two hills, the one North about two miles, and the other South at a greater diftance ; thefe ferred after as {om- 
pleat roaiks in the meridian : and few meridians there are, I believe, of fuch a length. At firft, before I could de- 
pend upon the inftrument’s keeping its direftion all night ; I fent a man to place a candle in the center of the mark 
placed in the meridian, and it was very feldom that I found it vary in the leaft : what fmall difference might 
fometimes appear, was more probably owing to the placing of the candle, than the movement of the inftrument. 
