[ 296 ] 
was finIQied, and put up out of doors; the obfer- 
“ fcrvatory being not yet ready. 
I had, however, for fome weeks before this, 
“ with my 36 feet refrador, obferved eclipfes of 
“ Jupiter’s firit fatellite, in fuch a manner, that 
though my equal altitude inflrument was not fi- 
“ nifhed, and confequently I could not fet my time- 
“ piece to apparent noon, I Ihould, notwithfland- 
V ing, be able to tell the true time of thofe eclipfes 
“ afterwards, when the inflrument fliould be fi- 
“ nilhed. For this purpofe, I obferved, almofl every 
“ fair evening, the time by the clock, when the 
bright ftar in Orion difappeared. behind a fixed 
obflacle, by applying my eye to a fmall fight- 
“ hole, made through a piece of brafs, faftened to a 
“ flrong pod. The obfervations were as follows : — 
1769. 
Star difap- 
Immcrlions of ift 
Equal altitudes obferved. 
Hence the 
pearcd per 
fatellite, per clock. 
Sun on me- 
clock. 
ridian per 
February. 
March. 
clock. 
Day. 
h 
' . 
Day. h ' " 
Day. •> ' " 
h 
/ 
// 
h / tr 
Febr. 1 5 
22 
9 
8 
26 39 
58 p 
16 ^4 24 58 
23 16 17 41 
19 
r 8 58 52 
I9 2 
2 
2 
56 ^2 
53 32 
II 57 37 
2+ 
8 
50 57 
Hence from the equal 
altitudes in column 3; 
the apparent times of 
March ? 
1 2 
8 
7 
23 21 
48 26 
40 41 
20 
f 8 c6 40 
1 8 59 59 
2 
2 
58 
55 
26 
7 
II 57 18 
7 
the two above immer- 
17 
7 
29 4 
fions are 
20 
7 
17 16 
Feb. ^ ” 
2 1 
7 
13 21 
16 14 21 10 
2S 
6 
45 44 
23 i6 15 I 
- “ From March 20 to May 20, the clock was al- 
tered feveral times, once taken down to be cleaned, 
“ removed back to the obfervatory, and regulated 
“ anew. Care, however, was taken to obferve equal 
“ altitudes 
I 
