[ azz 9 
has fomething to offer on the fubje€t. Yet. there is no doubt but 
it was obferved by fome perfon here in the year 1712 to be 11 
degrees 15 minutes weft, and ws Fofeph Moland was then City Sur- 
veyor I was in full expectation of getting fome intelligence from 
him; byt in that particular I was difappointed, as not one of 
his maps either of town or country, for the {pace of twenty years, 
makes the leaft mention of it. 
Gisson’s Surveying, page 308, gives the variation r1 de- 
grees I5 minutes in the year 1722; but it muft have been 
a miftake (probably an error of the prefs), for that year it was 
found to be 14 degrees 13 minutes by Mr. Grabam in London ;- 
however, as I can neither employ foreign obfervations, nor any 
of a doubtful nature at home, in the following calculations, I 
muft, for the prefent, content myfelf with requefting that any 
nobleman or gentleman who may be in pofleflion of a map or 
record made between the year 1657 and 1745, exprefling the 
variation, will be fo kind as to fend an account of it to the 
Secretary of the Royal Irifh Academy as foon as convenient. 
Now, though I am confined to Mr. Kendrick’s obfervation in 
1745, becaufe no other has been committed to writing, yet I am. 
of opinion he had as little idea of any regular increafe in the 
variation as any of his predeceffors: I am perfuaded it was the 
cafe, for we find another map of his in 1753, in the aforefaid. 
office, denoting the variation 19 degrees; the fame that. Mr. 
Gibfon publifhed it in 1751. A fecond confideration convinces 
me of this, viz. that he always writes the variation in whole de- 
grees, viz. either 18 or 19, (and that for a fucceffion of years) ; 
yet, 
