C «^7 ) 
In the Year 1695". when the Variation is 7 Degrees 
from the North to the Weftward, B having a Map of 
the Down Survey, and being fufpicious that hii Neigh- 
bour A had incroachedon him by a Ditch P Q-^jmploys 
a Surveyor to inquire into the Matter : The Surveyor 
finds by his Map that the BjDundary between B and his 
Neighbour A run from tlTe Point P through a Meadow 
diredly according to the Magnetick Meridian S P iST* 
but obferving the Ditch P Q.caft up much to the Eaft-* 
ward of the prelent Magnetick Meridian , he concludes 
that A. has incroached on S, and that the Ditch ought 
to have been caft up alongft the Line P q, the Angle 
(l^P q b&ing an Angle of 7 Degrees, that is the prefent 
Variation of the Needle ; and the Line P q the prefent 
Magnetick Meridian : For which Variation, not making 
any allowance, he pofitively determines that B. has all 
the Land in the Triangle Qj^ q, more than he ought to 
have; and that his Ditch ought to run alongft the Line 
Pq. 
'Tis true indeed, if the Surveyor go the whole Sur- 
round of the Lands A and B he will find their Figure and 
Contents exacftJy agreeable to the Map here exprefTed. 
But then the Bearings of the Lines are all 7 Degrees dif- 
ferent from the Bearings in the Map, and they will run 
in and out upon the adjacent Neighbouring Lands, and 
cau(e endlefs Differences between their Poffeflbrs ; as is. 
manifeft from tile Figure : wherein the prickt Lines re- 
prefent the Difagreement in the Bearings of the Lines, 
protracted from the Point P ; and we fee A incroaching 
on his Neighbours on the Weftward, as he incroaches 
on 5, and Bs Eaftward Neighbours incroaching on him,, 
and fo forward and clear round. Whereas, by a due at 
lowancefor the Variation of the Needle, all this Confu- 
fion and Dilagreemem is avoided ^ and every thing hits, 
right 
Thua 
