( TP? ) 
Age, being then in my fixty-fourth Year, which put 
me paft all Hopes of ever living to fee a compleat 
Period of eighteen Years Obfervation. 
But, Thanks to G o d,. he has been pleafed hitherto 
to afford me fufficient Health and Vigour to execute 
my Office in all its Parts with my own Hands and 
Eyes, without any Affiftance or Interruption, during 
one whole Period of the Moon’s Apogee j which Peri- 
od is performed in fotnewhat lefs than nine Years. 
In this Time I have been able to obferve the Right 
Afcenfon of the Moon at her Tranfit over the Me- 
ridian , near fifteen hundred times (and with an Ex- 
act fiefs, I am bold to fay, preferable to any thing done 
before) a Number not lefs than thofe of the noble 
Tycho Brahe , Hevelius and Flamjteed , taken in one 
Sum, there being near four of my Lunar Obfervati- 
ons for each Degree of the Zodiack, as alfo for each 
Degree of the Argumentum annuum, or Diftance of 
the Sun from the Moon’s Apogee. And that thefe 
might be duly applied to rectify the Defers of our 
Computations , I have myfelf compared with the afore- 
mentioned Tables, made according to Sir Ifdac’s 
Principles, not only my own Obfervations, but alfo 
above eight hundred of Mr. Flamfieed’s. 
This Comparijon of my own Obfervations (from 
the Time I efteem them compleat) with the Compu- 
tus by the faid Tables, being now continued for above 
nine Years, I defign fpeedily to communicate it to the 
Publick, together with the Tables themfelves, which 
have been printed, and fhould long fince have been 
publifhed, had not my Poll at Greenwich given me 
an Opportunity to examine, with proper Nicety, in 
C c what 
