Mr. N. Pigott’s Obfirvat'wn, &c. 
3 *»' 
Apparent time. 
H. M. S. 
19 34 30 perpendicular, as above, bifedls Mercury and fpot 
19 42 30 perpendicular from Mercury on E. W. is beyond 
Ipot (#). 
19 45 30 it is fenfibly beyond fpot (<2). 
20 12 30 perpendicular from the fun’s limb on E. W. equi- 
diftant from (a) and (c). 
20 27 30 Mercury very black, round and well defined. 
20 45 41 internal con t aft ; perliaps a few feconds too foon. 
20 47 26 emerlion of center by ejiimation . 
20 49 x6 external contaft. 
20 49 41. Mercury certainly clear of the fun*. 
a. b. c. d. d. d. are fpots in the fun; Z. zenith* 
E. Eaft ; W. weft of the folar difc. 
The internal contaft being at 20 h. 45' 41 /7 , and the ex* 
ternal at 20 h. 49 / 1 6 7/ , the emerfion of the center of Mer- 
cury muft have been at 20 h. 47' ; which differs only 2§ 
feconds from the eftimated time; and the duration of total 
eg refs was 3 m. 35 f. 
N. B. The reafons why the nine firft obfervations are all 
marked at 30" is, that in reality they were fet down at the 
minute only ; and that I have added 2' op" to each to reduce the 
time by the clock to apparent time ; more nicety would have 
been fuperfluous ; but the four left 'were rigoroufly competed* 
