[ 40 ? ] 
XXIII. The Latitude and Longitude of York determined from a 
V ariety of Afronomical Obfervations ; together with a Recom- 
mendation of the Method of determining the Longitude of 
Places by Obfervations of the Moods Tranft over the Meri- 
dian . Contained in a Letter from Edward Pigott, Efq. 
to Nevil Malkelyne, D . D. F. R. S . and Afronomer 
Roy ah. 
Read June 29, 1 7 86*. 
$ I R, Bootham, York, March 16, 1786. 
T HE great number and variety of obfervations I have 
made for determining the longitude and latitude of 
York will, I believe, fettle thofe points very accurately: I 
therefore wifh to have them prefented to the Royal Society* 
and beg the favour of you to be at that trouble. The inftru- 
ments I ufed were a good gridiron pendulum clock, a 2f feet 
reflector, an eighteen-inch quadrant by Bird, and a tranlit 
ihftrument made by Sisson. 
The difference of meridians between Greenwich and York, 
was found by the following methods. 
Oecultations 
