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4 
An account of the methods .ufed to afcertain the going of a 
clock, fixed up in the Round Tower at Windfor Caftle, in 
latitude 28'^ N. from the 30th of May to the 3d of June 
following, 1769. 
'By a mean of three double altitudes of the Sun's 
center, the limb not being well defined, taken 
$ May 30 with a good Hadley’s quadrant, made by Adams, 
in a faucer of treacle and water, fo placed within 
‘ the room as not to bedifturbed by the wind, af- 
at 4I p. m. ter having worked each feparately, I found the 
clock to be ^ 18" too flow for the Sun, and 
L o' 2^' too flow for mean time. 
'By a mean of four double altitudes, J ,, 
of the Sun’s upper limb, after being I 
worked feparately, found the clock too f 
flow for mean time J 
And by a mean of 3 correfponding alti - 1 
titudes the fame afternoon J 
7 f June I J * By a mean of 4 altitudes, worked fepa- J 
\ rately, too flow J 
fBy 9 different altitudes of the Sun’s up- 
I per limb, all worked feparately, and 
J taking the mean, found the clock too 
flow 
And, by a mean of 3 correfponding alti -1 
tudes, the fame day J 
By the mean of two altitudes only ; 
the weather not permitting more, 
made the clock too flow for mean 
time 
The fame afternoon, the weather being-v 
extremely fine, by 4 more double al- I 
titudes of the Sun’s upper limb, work- I i 42 
ed feparately, and a mean taken, found j — — 
the clock too flow for mean time J 
5 May 31 
at 8| a. m. 
at si P.m. 
? June 2 
at 8^ a. m. 
J} June 3 
at 8| a. m. 
Ditto, 
at4J p. m. 
o 40 
o 48 
I 00 
i6| 
I 17 
> 1 
26 
• Wound up the clock juft before thefe altitudes were taken, which 
might affe(!k it fomething, although a regulator. 
By 
