[ 43 8 ] 
pendulum : another piece of wood, with fuch an- 
other cavity in it, likewife fitting the bob of the pen- 
dulum, was applied to it, on the fore-part, and 
fcrewed firmly to the other piece : fo that the bob 
was embraced between the two pieces, and fecured 
firmly to them, and to the back of the clock-cafe. 
Two little pieces of wood likewife kept the upper 
part of the pendulum in its place, from receiving any 
motion near the center of fufpenfion. 
When the pieces of wood were taken away, and 
the pendulum thereby difengaged, the clock was fit 
for ufe : only, to adjuft the pendulum to the fame 
exadt length, as it was of at Greenwich, a mark had 
been made on the rod, where the top of the bob of 
the pendulum rofe to j and Dr. Bradley informed 
me of the number, which flood againft the index, 
on the nut at the bottom of the pendulum, by fcrew- 
ing or unfcrewing of which the bob is elevated or 
deprefied. 
I had a poft fixed up on the top of a hill, at a di- 
flance due north of me, to which I always adjuficd 
the tranfit infirument, before an obfervation, which 
then gave the true time of the tranfits of the Sun and 
flars acrofs the meridian, within a very few feconds : 
for it was not neceflary for my purpole, to be more 
precife in the fixing of my mark, which would have 
been attended with great trouble, on account ot its 
fituation, as the clock was to remain fixed up in the 
place, where it was, only for a few weeks, and as I 
always adjufted the infirument truely to the fame ver- 
tical circle, which was at the fame time very near to 
the meridian. 
I fhall 
