166 



Land Magnetic Observations, 1911-13 



NORTH AMERICA. 

 United States concluded. 



Derring Harbor. Shelter Islatid, New York, 1913 cont. 

 about station: north oak tree, 4.65 meters; east dead 

 twin treeSj 5.64 meters; west dead tree, 4.22 meters. 

 True bearings: tip of tower of Union Chapel, Shelter 

 Island Heights, 94 4r.3; middle of top of tall cliim- 

 ney, Greenport water works, 120 23'. 6; flagstaff at 

 Greenport schoolhouse, 144 IS'.O; middle top of tall 

 chimney of Greenport Hygeia Ice Co., 151 18' 7; tip 

 of spire of First Baptist Church, Greenport, 154 15'.1. 



Greenport, Long Island, Mew York, 1913. Only station yl of 

 1909 reoccupied. Two stations, A and B, were occu- 

 pied in 1909 and 1910. Station A is identical with 

 United States Coast and Geodetic Survey station of 

 1904. It is in northern part of school grounds just south 

 of row of large maple trees; marked by marble post 

 lettered on top "U.S.C.& G.S. 1904," with hole at cen- 

 ter marking precise point. Presbyterian church 

 spire is in true bearing 203 22'.2. Station B is 52.7 

 feet (16.06 meters) from station A in line from A to 

 spire of Catholic church. CathoHc church spire is 

 in true bearing 45 27'.4. 



Washington, District of Columbia, Coleman Park, 1912. 

 Two stations, designated A and X, were occupied in 

 subdivision known as Coleman Park, situated north 

 of National Zoological Park and west of Rock Creek 

 Park. A is over small quartz stone in place, on liill- 

 side below north turn in driveway called Alta Vista 

 Terrace, 137 feet (41.8 meters) from east edge of 

 driveway, 37 feet (11.3 meters) south of path leading 

 down hill, and 47.8 feet (14.5 meters) southwest of 

 large chestnut tree. True bearings: A', 69 49'.4; 

 extreme left edge of Kenesaw Apartments, 303 39'. 0; 

 dome on Ontario Apartments, 324 54'.8; Washington 

 Monument, 344 OS'.O. A' is above Alta Vista Terrace, 

 6 feet (1.8 meters) east of gum tree, 192 feet (58.5 

 meters) southwestof A. True bearings: ^,249 49'. 4; 

 southwest corner of stone barn in Rook Creek Park, 

 287 Ol'.O; dome on Ontario Apartments, 322 29'.4. 



Washington, District of Columbia {New Site of Department 

 of Terrestrial Magnetism), 1912. In October, 1912, 

 the two obser\ang houses known as A and C, located 

 near Ontario Apartments, on bluff southeast of 

 National Zoological Park, were moved about 3 miles 

 northwest to positions northeast of new ofRce, labora- 

 tory, and shop building of the Department, located at 

 Broad Branch Road and Chevy Chase Drive. Obser- 

 vations for determinations of constants and compari- 

 son of instruments were continued in these houses in 

 new location. Tliere is one station in each house and 

 these are designated as .4 and C respectively. Obser- 

 vations were made during eclipse of October 10, about 

 100 feet (30 meters) south of A. 



SOUTH AMERICA. 



Argentina. 



Concordia, Enlre Rios, 1913. Near Puerto de los Agua- 

 deros, on gi-assy river bank probably in general 

 neighborhood of 1912 station of Argentine Meteoro- 

 logical Office, 194 paces west of street leading to 

 Puerto de los Aguaderos, 35 feet (10.7 meters) north- 

 northwest of river bank, 70 feet (21.3 meters) south of 

 small pond, 28 feet (8.5 meters) east-southeast from 

 clump of bushes, and 30 feet (9.1 meters) west of 

 small depression; marked by hole in top of round 

 post 3 by 24 inches (8 by 61 cm.) projecting 1 inch 

 (3 cm.) above ground. True bearings: top of cupola 

 on church, 97 49'.3; top of flagstaff on rifle-range 

 buUding Tiro Federal, 199 08'.3; right edge of black 

 smokestack in Salto, 250 23'.0. 



SOUTH AMERICA, 

 Argentina continued. 



Corrientes, Corrienles, 1913. Approximately the 1912 sta- 

 tion of the Argentine Meteorological Office, in Plaza 

 San Martin; 197 feet (60.0 meters) east of fence bor- 

 dering Santa Fe Street, and 301 feet (91.7 meters) 

 south of building being erected in plaza; marked by 

 peg projecting 1 inch (3 cm.) above ground. 



Formosa, Formosa, 1913. In open field on opposite side 

 of railway from Federal rifle range, in line with east 

 side of street terminating at south side of field, 391 

 feet (119.2 meters) north-northwest of end of street, 

 and 175 yards (160 meters) east of railway; marked 

 by hardwood peg projecting 1 inch (3 cm.) above 

 ground. True bearings: right edge of red factory 

 chimney, 310 04'.6; top of wireless tower, 348 U'.O. 



Ilali, Corrienles, 1913. In pasture belonging to Seiior 

 Mariano Garcia, on east side of Moreno Street, 310 

 and 267 feet (94.5 and 81.4 meters) respectively from 

 north and east fences, and about 50 feet (15 meters) 

 east and north of dense growth of bushes in swamp; 

 marked by peg projecting 1 inch (3 cm.) above ground. 



I(a-Ybate, Corrientes, 1913. In pubhc plaza, in center of 

 town, 301 feet and 243 feet (91.7 and 74.1 meters) 

 respectively from north and east fences; marked by 

 peg driven flush with ground. True bearing: pillar 

 of church, 83 57'.0. 



Ituzaingo, Corrienles, 1913. Approximately reoccupation 

 of station of Argentine Meteorological Office, in center 

 of Plaza General Mitre, in front of church, 146.5 and 

 95 feet (44.6 and 29.0 meters) respectively from south- 

 west and southeast fences, and 52 feet east-northeast 

 of tree; marked by brass screw in top of tent peg pro- 

 jecting 1 inch (3 cm.) above ground. True bearing: 

 center of cross on church, 134 37'.3. 



Mercedes, Corricides, 1913. Approximately station of 

 Argentine Meteorological Office of 1912, in pasture 

 on farm of Senor Inocencio Diaz, north of dwelling- 

 house, 141 feet (43.0 meters) e.ast of front fence, 184 

 feet (56.1 meters) north of corner of fence inclosing 

 tilled ground, 100 feet (30.5 meters) north-northwest 

 of shrubby tree, and 59 feet (18.0 meters) .south- 

 southwest from small tree; marked by small tent peg 

 driven flush with ground. True bearing: left edge of 

 large water tank in town, 347 52'.6. 



Mo7ile Caseros, Corrienles, 1913. On municipal property 

 on open bank of river, east of town, in line with west 

 side of Uruguay Street, and 187 paces west from edge 

 of river; marked by hole in top of tent peg driven 

 flush with ground. True bearings: tip of church 

 spire in Monte Caseros, 148 07'.8; left spire of church 

 in Santa Rosa, 281 28'.2. 



Pilar, Cordoba, 1911, 1913. Four stations, pier 1, pier 8, 

 station B, and station C, were established at the 

 Magnetic Observatory; all in Une with observatory 

 mark No. 1 (black line painted on stone pier) wliich 

 is in true bearing 100 14'. 6. Pier 1, in absolute 

 house, is 139.2 meters east of mark No. 1, and is 

 observatory station for absolute determinations of dec- 

 lination and horizontal intensity. Pier 8, in absolute 

 house, is 9.02 meters east of pier 1, and is observatory 

 station for absolute determinations of inclination. 

 B is 33.04 meters east of pier 8 in line to mark No. 1 

 extended; marked by pier erected bj' observatory- 

 authorities. C is 28. 1 meters east of B in line to mark 

 No. 1 extended; marked by pier erectetl by observa- 

 tory authorities. 



Piray, Misiones, 1913. In extreme west end of narrow- 

 strip of cleared land on top of hill west of buildings, 

 112 feet (34.1 meters) southwest of fence corner, 9 



