598 
THE EAEL OF EOSSE ON THE EADIATION 
Zen.-dist. 
Log correction. 
O 
29 
— 
0-0100 
35 
— 
•0049 
40 
— 
•0008 
45 
+ 
•0027 
50 
+ 
•0050 
55 
+ 
•0054 
GO 
+ 
•0032 
G5 
— 
•0011 
70 
— 
•0041 
75 
— 
•0041 
79 

•0082 
The corrected curve was then found to intersect Seidel’s at 38 c, 2 and at 44 o, 0, while it 
was 0-0034 below it at 29 o, 0, and 0-0038 below it at 50 o, 0. On comparing the two curves 
for the whole interval between 29° and 50°, the new curve was found to be exactly 0-0010 
below Seidel’s on an average ; and since, as has already been said, our observations do 
not extend to within less than 29° of the zenith, this correction of +0-0010 was applied 
to the whole of the Table deduced from the new curve. At the same time a small 
systematic error which had arisen from an oversight in the Table for log (g) was 
allowed for; the error from this source might have been neglected, as it was only 
0-0001 for z= 35°"5, increasing to 0-0004 at 78°-5. These corrections being made, and 
the tabular quantities being slightly adjusted so as to make the differences run more 
regularly, the following definite Table for the extinction of the moon’s radiant heat in 
the atmosphere was obtained, where, as before, the argument is the true zenith-distance, 
and q>z is the logarithmic factor for reducing to the zenith. 
Corrected Table for reducing to the zenith. 
Zen.-dist. 
29 
30 
31 
32 
33 
34 
35 
36 
37 
38 
39 
40 
41 ; 
42 ’ 
0-0046 
0-0056 ^ 
0-0067 !! 
0-0078 “ 
0-0090 
0-0102 A 
0-0115 
o-oi29 J : 
0-0143 
0-0158 £ 
0-0174 „ 
0-0191 ' 
0-0209 ® 
0-0227 
Zen.-dist. 
<p~- 
Zen.-dist. 
<ps. 
O 
42 
0-0227 
0-0247 
0-0268 f 
O 
55 
0-0575 
43 
56 
0-0609 
44 
57 
0-0645 
45 
0-0290 Y 
0-0314 
0-0339 A 
0-0365 f 
58 
0-0683 
46 
59 
0-0725 
47 
60 
0-0771 
48 
61 
0-0823 
49 
0-0392 
0-0420 
0-0449 
0-0479 Y 
0-0510 V- 
0-0542 To 
0 0575 ^ 
62 
0-0881 
50 
63 
0-0945 
51 
64 
0-1014 
52 
65 
0-1088 
53 
66 
0-1167 
54 
67 
0-1254 
| 55 
1 
68 
0-1348 
34 
36 
38 
42 
46 
52 
58 
64 
69 
74 
79 
87 
94 
Zen.-dist. 
68 
69 
70 
71 
72 
73 
74 
75 
76 
77 
78 
79 
0-1348 
0-1449 
0-1557 
0-1673 
0-1797 
0-1930 
0-2074 
0-2232 
0-2407 
0-2603 
0-2823 
0-3069 
101 
108 
116 
124 
133 
144 
158 
175 
19G 
220 
246 
