ON THE LIGHT OF THE MOON AND OF THE PLANET JUPITER. 953 
April 13th. Fine sky. Perfectly clear. 
h Hm £ ft. 
9 54 Sid. time. Venus. Diaphragm Z. Lamp S. AZ 519 
' Di Di “ d == 50.6 
10 4 " Jupiter. » P d = 106.6 
2 : s d = 105.8 
Di Di “ d = 108.4 
ae o, 
April 18th. Perfectly clear. 
h m ` : ft. 
9 34 Sid. time. Venus (half enlightened). Lamp S. Diaphragm Z. d =3400.. 
9 54 ow " v s a d = 40.5 
CR 28 > y: es " d = 99.6 
May 2d. Clear, but not entirely free from haze. 
h ft. 
12 45. Sid. time. Moon 2 days before full; near the meridian. Lamp S. Diaphragm X. d = 2.75 
“ D D D & d = 2.45 
« « « « « d — 2.55 
D “ é i “ « d = 2.95 
: « « ` Lamp 1. « d = 2.35 
« Gi [11 Di & d — 9.5 
; « « « « « d — 235 
- & e & “ " d == 3.55 
May 4th. Thin, red haze, dense at horizon. 
h ft. 
13 15 Sid. time. Moon full. Lamp S. Diaphragm X. d = 3.06 
z e [74 “ Di d — 2.16 
« : « " d = 2.66 
May 25th. Clear. 
h : ft. 
12 32 Sid. time. Moon 5 days old. Lamp S. Diaphragm X. d == 93 
: « i “ a d = 103 
5 - ve 8 = IDA 
12 54 " " > " d 3 94 
« a d= %8 
74 DI Di d — 9 3 
May 28th. Clear. 
d ; : f. 
13 39 Sid. time. Moon 8 days old. Lamp S. Diaphragm X. In open air. d — 45 
“ “ DI & d = 4.0 
D “ D D d — 38 
Correction y to be applied as on March 30th. 
VOL. VIII. 33 
