C 33S ] 
1772. 
App.time. 
h Nov. 14. 
Firft fat. 
h / // 
5 59 44 
Em. good. 
* 773 - 
© Aug. 8. 
Third fat. 
II 15 dr 
inches. 
rnvifible 0,4 aperture. 
11 24 23 
11 31 10 
£m. 0,6 
Im. 3,6, or whole aperture. 
Obfervation good. 
Night clear, if. 
Alt. 21°. 
This being the firft trial of the diaphragms, and the evening 
favourable, I tried the effedl of them upon the other fa- 
tellites. 
inch. 
inch. 
Second fat. near If 
in vifible 
0,8 
vifible 0,9 
Fourth fat. 
fcintillation 
°»4 
vifible 0,5 
$ Aug, 31 
J 8ept. 20 
Firft fat. • 
9 4 ° — 
9 49 4 6 
9 5 1 44 
Second fat. 
1235 — 
12 43 14 
12 44 51 
Firft fat. 
12 47 8 
Third fat. 
1 1 40 dr 
M 46 19 
1 1 5 1 6 
11 51 23 
:]In viflble 0,7 aperture. 
Im. i,o;-but quere, I have 
fome fufpicion I 
ufed 1,2 by mif- 
take ; for I foftnd 
that afterwards in 
the cap which con- 
tains the diaph. 
3, 6, or whole aperture. 
Alt. 20 0 20'. Air 
calm, but not very 
clear. D diftant 
from- If. 3 2 0 . ' 
°>7 
!,0 
3,6 Alt 
39 
before. 
Air 
as 
0,8 
ing clouds at that 
time, though clear 
afterward. 
3,6 good. Alt. 
39 0 . 
177 ? 
