158 Philippine Journal of Science 1920 
TABLE 2. 
Date. Bisa | ldinde 96 | veal Remarks 
i BOS: ae 
1918. H. m. s o + | Am. 
Gatober To23) BIS Wk 4 58 26| —13 33.8| 6 0 
ee SR eee a a 4 58 38| —12 10.4| 6 9 
NEL SAS PER 468 2| —18 42.1| 6 7 
Gus e 4 63 58| —13 37.2| 6 28| Full moon, October 20. 
Woveinnbha Co 4 57 48 —13 38.0| 7 55 | Full moon, November 18. 
PE Ee ee ee 5 18 48| —12 9.6| 10 34 
December 10....-.------------ 5 18 21| —i2 23.2] 10 37 
Dever G8 5 19 7| —12 20.0/10 42 
D ber 16.-_. 5 18 14 —18 45.0|11 1) Full moon, December 18. 
a OY Gorn PR CRE 5 28 5| —13 15.4|12 33 
Janvary ti 5 28 32) —18 22.1) 12 50 | Full moon, January 16. 
Webruary 10/2655 222.5. 22. 5 23 35) —14 44.38/14 43 
February 12 -.....------------ 5 24 28) —14 24.1| 14 52| Full moon, February 16. 
Warvnnre 22 ceo oc 6 56 16} —18 41.8) 5 6| Evening, Batangas. 
March 4 5 16 —13 59.6) 16 2) Fullmoon, March 16. 
April 4 4 58 25 —14 34.1/17 42 
April 5 ..._.. 4 64 32) —14 8.0|17 47 
FSS LR SN Ree Ne ee ee re 4 54 17) —18 16.8) 18 5) Baguio. Full moon, April 5. 
PROT si on 4 34 21) -—14 46.7) 19 5 
May 1 4 36 48; —14 41/19 12 
May 2 --| 4 36 43) —18 57.3) 19 12 
OE Bite nae SOY SE Is “98041 19 2 
May 5 4 33 86| —14 12.8) 49 25 
May 8 ------| 4 84 12) —18 47.9 149 937 
rss : 84 57| —13 18.3) 19 49 Full moon, May 15. 
23 51 —}2 30.7) 20 58 
vane an : 426 3| -18 64.11/21 7 
on PRS RI ie 19{ —14 6.1! 21 8 | Full moon, June 14. 
ice A 50 42) —14 5.9] 6 29 
seth enn nem ne 50 49] ~—14 6.7| 5 83 Full moon, October 9. 
paler 
Of course this objection applies also to horizon observations 
of dawn, and with even , yeh 
on by scattering with greater force, because light is P 
ith greater intensity if the deviation is § 
patch uy. Ravicigs The reflecting power, as well as the ab- 
gion ae of the air is of course greatest in the lower aA 
kilometers hi oe rcmanlys level, in most latitudes about + 
neon fhe tet: The time of first visibility of cirrus clo¥ 
meters—ma: fe d their height—much greater than 2 kilo- 
flecting as pas in evaluating this objection, for thelr re 
they float r 1s Much greater than that of the thin air whet? 
y Hoat or that of the much thinner and dryer air above 
* Phil. Mag. VI 36 (19 
. 18) 445, ‘. +42 rmory 
Phil. Mag. VI 37 (1919) — » quoted in a critical note by J. La 
