OF HEAT FROM THE MOON. 
G05 
The values of z' were now laid down as ordinates with those of a as abscissse, the 
weight being indicated on the plan previously mentioned. A curve was then carefully 
drawn and read off and then compared with the observations ; in this way small correc- 
tions for the curve were deduced, and finally the following Table adopted as giving the 
best representation of the observations. (See also Plate XLVUL, A.) 
Phase Table. 
£. 
s. 
rJ 
£. 
z\ 
e. 
gt 
- 106 
104 
102 
100 
98 
96 
94 
92 
90 
88 
86 
84 
82 
80 
78 
76 
74 
72 
70 
68 
66 
64 
62 
60 
58 
56 
54 
52 
50 
— 48 
37*5 
39*0 1° 
41 ‘1 2-6 
43 ' 7 3-0 
46 * 7 3-6 
50-3 3 
54*2 , A 
58-6 4 4 
63*3 4 4 
68-1 ; 8 
73-2 5-3 
78 ’ 5 5-3 
83-8 _ 3 
89*2 H 
94 ’ 6 5-5 
ioo-i 
105-6 33 
m-2 
117-0 ll 
123,0 6-2 
129-2 <5.4 
135-6 7 t 
142-2 6 ‘ 6 
A R.q 
149-0 68 
156-0 70 
163-2 i A 
170 ‘6 7.6 
178,2 7-8 
186,0 8-0 
194-0 80 
0 
-48 
46 
44 
42 
40 
38 
36 
34 
32 
30 
28 
26 
24 
22 
20 
18 
16 
14 
12 
10 
8 
6 
4 
- 2 
0 
+ 2 
4 
6 
8 
+ 10 
194*0 8 . w 
202-2 8 ~ 
219.2 8,6 
228.0 9-0 
! M 
15 9.6 
255-9 l r 
265*8 ll 
276.0 0-6 
286-6 
297-8 ~ 
309-7 “.7 
322,4 2-Q 
335-3 2.9 
348-2 -7 
360-9 1 
373-0 frf 
384.3 0-0 
394-3 ” 
402- 0 ' t 
4 06- 2 4 ;~ 
407- 3+ -0 
406.3 3-0 
403- 3 3 ° 
398-3 5 ;5 
391-6 07 
383-7 ' 7 
375.4 8-5 
366-9 8 5 
0 
+ 10 
12 
14 
16 
18 
20 
22 
24 
26 
28 
30 
32 
34 
36 
38 
40 
42 
44 
46 
48 
50 
52 
54 
56 
58 
60 
62 
64 
66 
+ 68 
366 ' 9 8-8 
358>1 8-8 
34 9- 3 8-8 
340,5 8-8 
SSi-7 ll 
322-8 
314 -° s| 
29 6 -2 8 9 
287-3 8 9 
278,4 8-9 
269-5 83 
260-7 8 8 
OKI .Q ° j 
~ oi 8 8-9 
242-9 
034.1 88 
I g.Q 
225-2 0 J 
216-3 89 
207,6 8-6 
199-0 86 
190-8 7-8 
183-0 
... . 7-b 
1/5 ' 4 7-4 
is a 
143-0 
137-7 J 
132-5 
+ 68 
70 
72 
74 
76 
78 
80 
82 
84 
86 
88 
90 
92 
94 
96 
98 
100 
1 02 
104 
106 
108 
110 
112 
114 
116 
118 
+ 120 
132-5 , . 
127-4 L! 
122-4 5-0 
U7-4 4.9 
112-5 .i 
107,6 4-9 
102-7 
' 3-0 
97.7 0 u 
' 4.9 
92.8 5-0 
87-8 M 
82-9 
78-0 4.9 
73- 1 
nl 4,8 
63-5 4 . 7 
58-8 , t 
r A Q 4-5 
° 4 3 
50-0 4 3 
45.9 3-9 
42-0 „ Z 
38-3 
34-8 3 ‘ 3 
31-5 3-0 
*** r 6 
25-9 ; ® 
23*6 2.0 
21-6 * u 
Prom this Table the numbers in column VIII. were taken out. Column IX. shows the 
difference between curve and observation ; and for the purpose of giving a better idea 
of the degree of agreement, the percentage error is given in column X. The sum of 
r 100 1 2 . 
w lX r (C — O) i is 25917*4, and the number of nights, omitting the first two and the last, 
is 34 ; whence the mean percentage error of a single set of ten readings has been calcu- 
lated on the usual assumption that the errors are inversely proportional to the square 
root of the number of sets. 
This mean error is ±28*02 per cent., corresponding to a probable error of ±18*9 per 
cent. The average number of sets is 47 ; this gives ±12*9 per cent, for the mean and 
±8*7 per cent, for the probable error of a night’s observations; a comparison of these 
numbers with column IX., however, shows that large constant errors were doubtless 
4 M 2 
