1020 
Mr. ludlam on an 
The barometer flood at 29,9 ; the thermometer at 7 i®. 
The error of the line of collimation was, in the fummer 
of 1774, 1 3)8 feconds to be fubtradfed (fee Phil. Tranf. 
yol. lxv. part 2 ). As the quadrant has not been altered,, 
and indeed feldom ufed fince, I fuppofe the error of the 
liqe of collimation to remain the fame. From the firfl 
obfervation F make the clock to be i f 21" fafter than 
folar time. From the fecond, i' 22". From the third, 
i' 23". Taking the mean of thefe, viz. x' 2 2", the be- 
ginning of the eclipfe at Leicefter was at nth 34' 5"; the. 
end at v h 1 8' 8 ;/ or 1 2" by folar time. 
The difference between the meridians of Greenwich 
and Leicefter, from obfervations in the Philofophical 
Tranfadlions, computed by Mr. wales, matter of the 
royal mathematical fchool in Chrift’s HofpitaL 
M S 
From folar eclipfe June 3, 1769, { Encl' i ' ,n ' n ^’ ^ 2 g’^ 
f Tauri, April 28, 1770* Immerfion 427,8 
Aldebaran, Nov. i8, 1774, Emerfion 4 50,5. 
Solar eclipfe, June 24, 1778, {^^“ UDg * 
M. du sejours, in the Memoirs of the Academv of 
Sciences for 1771 , makes the difference of the meridians 
of Paris and Leicefter, from the end of the folar eclipfe 
of 1769, to be 13' 59"; and the difference of the meri- 
dians 
