314 



Ocean Magnetic Observations, 1905-16 



ISLANDS, ATLANTIC OCEAN. 

 Iceland — concluded. 



Reykjavik, 1914 — continued. 



wooden stake driven flush with giound. True bear- 

 ings: observatory tower flagstaff, 6° 0516; Catholic 

 Church spire, 25° 14:4; Valhusbakki beacon, 57° 1311; 

 Grotta Lighthouse, 78° 2717; red light near north end 

 of island, 120° 49(5; church spire at Akranes, 153° 

 1013; nearest corner of red and white house, 289° 

 40 ; 1 ; red light near dwellings, 305° 50 ! 9. Three auxil- 

 iary stations, designated B, C, and D, were also occu- 

 pied. B is 52.45 meters east-southeast from A, and 

 in range between A and corner of red and white house; 

 C is 72.3 meters from A, in azimuth 128° IT.l; D ia 

 104.8 meters southwest from A, and in range between 

 A and Valhusbakki beacon. 



Fidel/ Island, 1914. — On a small grassy knoll, at most 

 westerly point of island, 12 paces and 10 paces from 

 precipitous edge of island to north and east respec- 

 tively. True bearing: station A on Engey Island, 

 85°44;9. 



Madeiras. 



Funchal, 1909. — The main station, designated A, is near 

 center of parade grounds of College Barracks and as 

 close as could be determined to station of Capt. F. A. 

 Chaves, 1903 and 1906. The Cathedral spire is in 

 true bearing 315° 16!4. The secondary station, desig- 

 nated C, is on point west of Funchal, about one-eighth 

 mile (0.2 kilometer) east of new fish cannery, on a 

 level bluff about 60 feet (18 meters) above water and 

 about 15 feet (4.5 meters) back from beach. Sail Rock 

 is in true bearing 277° 16:3. Auxiliary stations were 

 estabUshed at both of these points and showed con- 

 siderable local disturbance; B was 40 feet (12 meters) 

 from A, and D was 42.5 feet (13 meters) from C. 



St. Helena. 



Longxoood, 1913. — Four stations, designated A, B, C, and 

 D, were occupied. Main station, ^, is on triangular 

 lawn west of house in which Napoleon died, 53.05 

 meters west-southwest from southwest comer of north 

 post of yard gate, 34.1 meters northwest of west corner 

 of masonry support for three water tanks, and 13.1 

 meters due north of point in Une with flax hedge; 

 marked by cross cut in top of spruce post driven flush 

 with ground and covered with sod. True bearings: 

 northeast comer of house, 82° 13!7; flagpole at High 

 Knoll Fort, 102° 31 {5; prominent rock on Signal Hill, 

 186° 32:7; north gable of stone house on hill, 345° 

 54:1. B is 26.4 meters west-southwest from A on 

 azimuth line to northeast corner of house, 12.7 meters 

 north of flax hedge, and 21.7 meters southeast of iron 

 telephone pole; marked by cross cut in top of tent peg 

 driven flush with ground. True bearings: northeast 

 comer of house, 82° 13:7; flagpole at High Knoll 

 Fort, 102° 40: 1; prominent rock on Signal Hill, 186° 

 59:0; north gable of stone house on hill, 345° 05:2. 

 C is 27.25 meters west-southwest from B on azimuth 

 line to northeast corner of house, 27.9 meters south- 

 southwest from iron telephone pole, and 11.6 meters 

 north of flax hedge. True bearings: northeast corner 

 of house, 82° 13:7; flagpole at High Knoll Fort, 102° 

 49:4; prominent rock on Signal Hill, 187° 26:3; north 

 gable of stone house on hill, 344° 14:3. D is about 75 

 yards north of old magnetic observatory in open field, 

 11 paces north of fence along north side of yard in 

 front of Mr. Fred M. Deason's house. True bearing: 

 west edge of stone house, one-half mile (0.8 kilometer), 

 167° 33:3. 



West Indies. 



CuUbra Island, Scorpion Point, Porto Rico, 1910. — 

 Practically identical with that of the U. S. Coast and 

 Geodetic Survey of 1903 and 1904, on line between 



ISLANDS, ATLANTIC OCEAN. 

 West Indies — concluded. 



Culebra Island, Scorpion Point, Porto Rico, 1910 — con. 

 the hydrographic signal "Scorp 2" and the triangu- 

 lation station "Soldado," 7.9 meters from "Scorp 2," 

 3.6 meters from edge of bluff that stands at this 

 place, the Latter distance being measured in the 

 direction of the "Soldado" triangulation station. 

 The azimuth of the "Soldado" triangulation station 

 as supplied by the U. S. Coast and Geodetic Survey 

 is 314° 46:5. 



Vieqties, Porto Rico, 1910. — Observations were made in 

 the new absolute house of the observatory on the 

 regular magnetometer pier and the regular earth- 

 inductor pier, these two piers being designated as 

 New Absolute Observatory. Stations 1 and 2 are 

 in line with the azimuth pier of the observatory and the 

 right-hand edge of Caballo Blanco Reef, which is 3.5 

 kilometers distant. Station / is 24.2 meters to 

 the seaward of the azimuth pier. Station 2 is 26.4 

 meters to the landward of the azimuth pier. The 

 tower of the lighthouse at Point Mulas is in true bear- 

 ing from magnetometer pier 199° 20:0; from station 

 ;, 200° 23 :i; and from station 3, 198° 12:5. 



ISLANDS, INDIAN OCEAN. 



Ceylon. 

 Colombo, 1911. — Three stations, designated A, B, and C, 

 were occupied in western part of grounds of Colombo 

 Observatory. A is 108 feet (32.9 meters) from south- 

 west fence,"l64 feet (50.0 meters) southwest of south- 

 west comer of office building, 80.62 feet (24.57 meters) 

 west of thermometer shelter, and 69.8 feet (21.28 

 meters) northeast of large tree; marked by cement 

 block 3 feet (0.9 meter) long and 5 inches (12.7 cm.) 

 square at top, lettered on top "C.I.W. 1911." True 

 bearings: northwest corner of lunatic asylum, 55° 

 40:6; small white upright over east gable of "Gras- 

 mere," the Sui-veyor-General's bungalow, 177° 25:8, 

 southeast corner of office, 235° 30:3. B is 217.67 

 feet (66.35 meters) north of A, on azimuth Une to 

 "Grasmere." C is 84.62 feet (25.79 meters) north 

 oi A, on azimuth line to "Grasmere." 



Colombo, Cinnamon Gardens, 1911. — In vacant lot owned 

 by Mr. S. M. Femando, on north side of Bogatelle 

 Road, Cinnamon Gardens, opposite La Comiche 

 Bungalow, 102.4 feet (31.21 meters) north of wire 

 fence along road, 124 feet (37.8 meters) east of stone 

 wall on west side of lot, and 19.2 feet (5.85 meters) 

 northwest and northeast respectively from two palm 

 trees. 



Java. 



Wellevreden (Batavia), 1911. — Two stations, designated A 

 and B, were occupied in grounds of Royal Magnetic 

 and Meteorological Observatory. A is 13.35 meters 

 southwest of southwest corner of foundation of abso- 

 lute house, 22.6 meters northwest of east end of brick 

 wall at rear of grounds. True bearing: azimuth mark 

 of observatorj', line on concrete pillar near west side of 

 main entrance, 178° 14 : 1. B is on azimuth line from 

 A to mark, 14.87 meters north of A, and 11. -30 meters 

 west of southwest corner of foundation of absolute 

 house. For intercomparisons with observatory stand- 

 ards, observations were made on piers in absolute 

 house of observatory, declination being observed on 

 declination pier, horizontal intensity on piers A and 

 C, and inclination with earth inductor on earth-induc- 

 tor pier. 



Matjrititjs. 



Pamplemousses, 1911. — Four stations, designated A, B, 

 C, and D, were occupied in grounds of Royal Alfred 

 Observatory. A is central pier of absolute house. 



