i7, 6 Fisher: Low-sun Phenomena in Luzon, III 6H 
3 m. 55.4 s. Depending on the state of the sea, the eye was 3 
to 6 feet above actual sea level. For these locations the ex- 
tremes for duration of sunset, computed from Nautical Almanac 
data, are approximately 
Seconds. 
Autumnal equinox 
132.0 
Winter solstice 
147.6 
Vernal equinox 
133.1 
Summer solstice 
143.0 
Nos. 13 to 16 and 42, were made at the Meteorological Observ- 
atory, Mount Mirador, Baguio, Benguet, latitude north 16° 25', 
longitude east 120° 36' ; the elevation of the standard barometer 
cistern is 1512.5 meters, and this is nearly the height of the eye 
in observing. At this point, during a large part of the year 
the sun sets in a sea horizon of the China Sea, beyond the Lin- 
gayen Gulf and the land about Cape Bolinao. 
No. 17 was made at a point on the beach of San Fernando 
Harbor, La Union, 270 paces northward of the old pier at the 
end of Calle Coronel Duvall. Measurements on a Coast Survey 
chart locate this point in latitude north 16° 37.3', longitude east 
120° 18.5'; height of eye about 5.5 feet. From this point the 
line of sight at sunset passed over the surf of the south coral 
reef at the harbor entrance and just cleared San Fernando Point. 
Nos. 37 to 41 were made at San Fernando Point Lighthouse, * 
La Union, latitude north 16° 37' 02", longitude east 120° 16' 33" ; 
No. 37, from the lighthouse balcony, with the eye at about the 
level of the lamp, 107 feet; the others, on the ground at the base 
of the tower, with the eye about 84 feet above the level of the 
sea. The state of the tide was not considered in computing. 
The horizon is a sea horizon from north to west southwest, 
where the islands and land of Cape Bolinao are dimly seen. 
In the table, the sixth column, headed “Mirage,” indicates 
whether in any direction there was visible the lifting or floating 
of land on the horizon, called “looming” by some Cape Cod 
fishermen. At Manila the sandspit of Cavite, Corregidor Is- 
land, and the land near Mariveles, in Bataan Province, served 
as tests ; at San Fernando, the coast north and south, but partic- 
ularly Santiago Island beyond the Lingayen Gulf. 0 means 
definitely no mirage observable ; 1 and 2, definite or very strongly 
marked mirage ; ? means mirage possible but not certain ; leaders 
indicate here, as elsewhere in the table, no record. 
Column 7 indicates the type of sunset, A or B, on which see a 
later paragraph. 
