[ 6 ] 
being turned to the oppofite Side of the Wall, 
whereon it now hangs ; I cannot, by attual Obferva- 
tions of the circumpolar Stars, fettle thofe neceflary 
Points ; and therefore have endeavoured to do it, by 
comparing my own with your Lord fh ip’s Obferva- 
tions : and until thisDefe<ft in the Apparatus belong- 
ing to the Royal Obfervatory be removed, we muft 
be indebted to your Lordfhip, for the Knowledge of 
its true Situation. 
^ A Mind intent upon the Purfuit of any kind of 
Knowledge, will always be agreeably entertained, with 
woiat can fupply the moft proper means of attaining 
it : Such, to the practical Aftronomer, are exact and 
well-contriv d Inftruments ; And I reflect with Plea- 
fure on the Opportunities I have enjoyed, of cultiva- 
ting an Acquaintance and Friendfhip' with the Per- 
fon, that, of all others, has moft contributed to their 
Improvement. For I am fenfiblc, that if my own 
Endeavours have, in any refpect, been effectual to 
the Advancement of Aftronomy ; it has principally 
been owing to the Advice and Afliftance given me 
by our worthy Member Mr. George Graham \ who fe 
great Skill and Judgment in Mechanicks, join'd with 
a complete and practical Knowledge of the Ufes of 
Aftronomical Inftruments, enable him to contrive 
and execute them in the moft perfect manner. 
The Gentlemen of the Royal Academy of Sciences, 
to whom we are fo highly obliged for their exact 
Admeafurement of the Quantity of a Degree under 
the Arctic Circle, have already given the World 
very convincing Proofs of his Care and Abilities in 
thofe Refpects ; and the particular Delineation, 
which they have lately publilhed, of the feveral Parts 
of 
