X 58 Philippine Journal of Science 1920 
Table 2. 
Date. 
Hour E. 
120°. 
Altitude of 
sun (center). 
Side- 
real 
time. 
Remarks. 
1918. 
H. 
m. 
s. 
o 
H. 
m. 
October 7 
4 
53 
26 
-13 
33.8 
6 
0 
October 8 
4 
68 
38 
-12 
10.4 
6 
9 
October 9 
4 
63 
2 
-13 
42.1 
6 
7 
4 
63 
63 
—13 
37.2 
6 
28 
Full moon, October 20. 
November 4 
4 
67 
43 
-13 
38.0 
7 
66 
Full moon, November 18. 
December 9 
5 
18 
48 
—12 
9.6 
10 
34 
December 10 
5 
18 
21 
—12 
23.2 
10 
37 
December 11 
5 
19 
7 
—12 
20.0 
10 
42 
December 16 
5 
18 
14 
—13 
45.0 
11 
1 
Full moon. December 18. 
1919. 
January 8 
6 
28 
6 
—13 
16.4 
12 
38 
January 11 
5 
28 
32 
-13 
22.1 
12 
60 
Full moon, January 16. 
February 10 
5 
23 
36 
-14 
44.3 
14 
43 
February 12 
5 
24 
28 
-14 
24.1 
14 
62 
Full moon, February 16. 
February 22 
6 
66 
16 
-13 
41.8 
6 
6 
Evening, Batangas. 
March 4 
5 
16 
53 
-13 
69.6 
16 
2 
Full moon, March 16. 
April 4 
4 
63 
25 
—14 
34.1 
17 
42 
April 5 
4 
64 
32 
—14 
8.0 
17 
47 
April 10 
4 
64 
17 
—13 
16.8 
18 
5 
Baguio. Full moon, April 16. 
April 30 
4 
34 
21 
—14 
46.7 
19 
5 
May 1 
4 
36 
48 
—14 
4.1 
19 
12 
May 2 
4 
36 
43 
—13 
67.3 
19 
12 
May 4 
4 
37 
63 
-13 
26.0 
19 
26 
May 6 
4 
33 
66 
—14 
12.8 
19 
26 
May 8 
4 
34 
12 
-13 
47.9 
19 
37 
May 11 
4 
34 
67 
—13 
18.3 
19 
49 
Full moon. May 15. 
May 30 - — 
4 
28 
61 
—12 
30.7 
20 
68 
June 2 
4 
26 
3 
-13 
64.1 
21 
7 
June 4 
4 
24 
19 
—14 
6.1 
21 
3 
Full moon, June 14. 
October 1 
4 
60 
42 
—14 
5.9 
5 
29 
October 2 
4 
50 
49 
—14 
6.7 
5 
83 
Full moon, October 9. 
Of course this objection applies also to horizon observations 
of dawn, and with even greater force, because light is passed 
on by scattering with greater intensity if the deviation is small, 
as stated by Rayleigh.® The reflecting power, as well as the ab- 
sorbing power, of the air is of course greatest in the lower re- 
gion, up to the strato-cumulus level, in most latitudes about 2 
kilometers high. The time of first visibility of cirrus clouds 
near the zenith, and their height — much greater than 2 kilo- 
meters — may assist in evaluating this objection, for their re- 
flecting power is much greater than that of the thin air where 
they float or that of the much thinner and dryer air above them 
“Phil. Mag. VI 36 (1918) 445, quoted in a critical note by J. Larmor, 
PhU. Mag. VI 37 (1919) 161. 
