[ 5^0 ] 
in fome of the following obfervations. It is faflened 
to a large ftone pillar, bedded on the wall of the 
houfe ; and is adjufted in the meridian, to a mark 700 
feet diftant. I mention thefe particulars, becaufe the 
obfervations fliew that even fo fmall an inftrument is 
capable of tolerable exadlnefs : and it is for that 
reafon I have fet down the refult of all the tranfits 
I have taken for a year part ; though much fewer 
would have fufficed for (hewing the rate of the 
clock. The obfervations themfelves are not here ; 
becaufe I would not trouble the Society with fuch a 
detail ; elfe they (hould readily have had them. It 
can be of no fervice to falfify calculations, which 
might have been with- held; and I believe to the beft 
ot my abilities, thefe are done accurately. I am fure 
they are delivered faithfully. 
The I ft and 2d columns require no explanation. 
The third fliews how much the clock proved to 
be or too faft, — or too flow, for mean folar time 
upon each obfervation, when it came to be calculated 
afterwards. The marks : : or : are fet down as any 
one appeared to me to be more or lefs doubtful at the 
time of obferving. The calculations will (hew which 
are really moft to be fufpedfed. 
The fourth column (hews how much the clock 
varied per day, when compared with the preceeding 
obfervation of the (ame objeeft. The fmall variations 
in thefe, are owing probably to errors in obferving, 
rather than to the clock itfelf. I do not pretend in 
obferving to diftinguKh nearer than to half a 
fecond; though the calculations are fet down in 
decimals. 
In 
