OF HEAT FEOM THE MOON. 
G09 
Journal of Observations and Preliminary Reductions. 
] 
1 L 
n. 
III. 
IY. 
V. 
VI. 
VII. 
VIII. 
IX. 
1 X ' 
XI. 
XII. 
XIII. 
The Moon 
S 
The adopted mean 
Observed 
deviation 
(G.). 
1870. 
Sidereal 
time. 
Apparent 
zenith- 
Apparent 
semi- 
lo g (g)- 
log (* * * § ** )• 
log (c). 
log 
(G corr.). 
Sidereal 
time. 
e. 
Apparent 
semi- 
distance. 
diameter. 
diameter. 
h m 
O / 
1-9920 
h m 
Aug. 8. 
10 13 
97-8 
-30 33 
76-4 
15 56 1 
9-9998 
00019 
00000 
19 45-0 
-30 19 
15 56 0 
19 31 
830 
-30 25 
76-5 
15 56-1 
9-9999 
00008 
0 0000 
1-9198 
-x- 
20 1 
774 
-30 13 
77-0 
15 56 0 
9-9999 
9-9991 
00000 
1-8877 
t gl 
20 13 
110 
-30 8 
77-4 
15 55 9 
0-0000 
9-9984 
00000 
1-0398 
Aug. 10+ . 
20 29 
f 162-7 1 
l gl 36-0 j 
- 5 59 
73-3 
15 40 0 
f 9-9995 1 
\ 0-0000 j 
00000 
00000 
2-2109 
20 29 0 
- 5 59 
15 40 0 
Aug. 1 1 . 
21 18 
3 73 4 
+ 8 29 
700 
15 30-8 
9 9995 
9-9992 
00000 
2-2377 
21 500 
+ 8 39 
15 30-8 
Igl 
21 33 
347 
+ 8 34 
69-8 
15 30-8 
00000 
9-9996 
00000 
1-5399 
21 4S 
106-6 
+ 8 38 
69-6 
15 30-8 
9-9995 
9-9999 
0-0000 
2-2211 
gl 
22 3 
323 
+ 8 43 
69-5 
15 30-9 
0-0000 
0-0003 
0-0000 
1-5095 
22 28 
155-9 
+ 8 51 
69-7 
15 30 9 
9-9996 
00010 
0-0000 
21934 
Aug. 12. 
19 55 
133-6 
+ 19 35 
75-8 
15 196 
9-9997 
9-9956 
0-0022 
21 233 
22 0-0 
+20 19 
15 21-9 
II 
21 35 
172-6 
+20 10 
67-5 
15 21-6 
9-9995 
9-9991 
0-0002 
2-2358 
Hffl 
21 52 
27-9 
+20 16 
66-8. 
15 21-8 
00000 
9-9997 
0-0002 
1-4455 
22 9 
181-3 
+20 22 
662 
15 22 0 
9-9994 
00003 
0 0000 
2-2581 
gi 
22 25 
320 
+20 27 
65-8 
15 22 0 
0 0000 
00008 
00000 
1-5059 
22 40 
181-6 
+20 32 
65 -5 
15 22-1 
9-9994 
00013 
0-0000 
2-2598 
Aug. 13. 
19 49 
74-7 
+31 0 
78-2 
15 10-2 
9-9999 
9 9954 
0-0028 
1-8714 
20 30-0 
+31 38 
15 129 
**gl 
20 15 
15 1 
+31 10 
75-0 
15 110 
0-0000 
9-9966 
00020 
1-7776 
20 27 
102-8 
+31 15 
73-6 
15 114 
9-9998 
9-9971 
00016 
20105 
gi 
20 45 
165 
+31 22 
71-6 
15 11-8 
0-0000 
9-9980 
00012 
1-2167 
21 4 
124-7 
+31 28 
69-7 
15 12-3 
9-9997 
9-9987 
0-0008 
2-0951 
22 49 
145-2 
+32 4 
62-0 
15 14 l 
9-9996 
0 0029 
9-9992 
2-1637 
9 l 
23 4 
21 0 
+32 8 
61-5 
15 14-3 
0-0000 
0-0034 
9-9990 
1-3246 
23 19 
148-9 
+32 12 
61 1 
15 14 3 
9-9996 
00038 
9-9990 
21753 
Aug. 11. 
21 6 
146-7 
+42 49 
70-3 
15 4-2 
99996 
9-9982 
0 0008 
21651 
21 40-0 
+43 2 
15 50 
tt gl 
21 21 
11-5 
+42 55 
686 
15 46 
00000 
9-9990 
00004 
1-1608 
21 37 
147-2 
+43 0 
66-9 
15 5-0 
9-9996 
9-9997 
00000 
2 1672 
gi 
21 51 
15-4 
+43 6 
65-4 
15 5-3 
00000 
0-0006 
9-9998 
11879 
22 10 
1420 
+43 14 
62-9 
15 61 
9-9996 
00018 
9-9988 
2T525 
* Aug. 8. — No mention of cloud. At 20 b l m the directive magnet was at 3-46 in. ; the reading has already 
been reduced to what it would have been with the magnet at 3-00 in. See preceding page. 
t 20 h 13 m . This and all subsequent experiments marked gl were made with the glass plate interposed. 
t Aug. 10. — Sky more or less streaky all night. The only available observations on this night were three 
sets, giving 252-1, gl 54 - 7, and 242-5 with the magnet at 3-46 in., for which the sidereal time 20 h 29 m has 
been adopted as best suiting the recorded altitudes. 
§ Aug. 11. — The original readings were taken with the magnet at 3-46 in. ; the proper reduction to 3-00 in. 
has been made. Sky slightly streaky all this night. 
|| Aug. 12. — There is no mention of the height of the magnet on this and the following night; but as the 
observations were made with it at 3-46 in. on the 11th and 14th, it is assumed to have been at the same height 
on the 12th and 13th. 
The telescope not on the moon for about half a minute. 
** Aug. 13. — Magnet at 3-46 in., observations reduced to 3-00 in. 
ft Aug. 14. — E.N.E. wind all night; galvanometer very unsteady. The magnet mentioned as being at 
3-46 in. ; observations reduced to 3-00 in. 
