238 CARNEGIE INSTITUTION OF WASHINGTON. 



and at Port Darwin September 14. Upon the completion of the work in 

 northern AiistraHa he observed at several secular-variation stations in the 

 East Indies and obtained comparison observations at the magnetic observatory 

 at Batavia, Java, while en route to Washington. 



Cooperation has been continued throughout the year with the government 

 astronomer of South Australia, Mr. G. F. Dodwell, and his chief assistant, 

 Mr. A. L. Kennedy, who reoccupied some of the earlier stations of the Depart- 

 ment, in connection with the observatory work. 



Absolute observations, as well as continuous photographic registrations of 

 the three magnetic elements, were made throughout the year at the Watheroo 

 Magnetic Observatory (see pp. 240-241).. 



2. North America. — After completing his work in Colombia in January, Mr. 

 Love returned to Jamaica and thence proceeded to Belize, British Honduras, 

 to carry out a plan of cooperation with the Mid-American Archaeological 

 Expedition of the Carnegie Institution of Washington, directed by Dr. S. G. 

 Morley. This expedition was equipped by the Department with a portable 

 wireless receiving apparatus and light theodolite for astronomical observa- 

 tions in order to fix with a precision of one-half mile the geographic positions 

 for eleven sites of Maya ruins under investigation. At the same time, 

 magnetic observations were made at eight stations in British Honduras and 

 northern Guatemala. The expedition left Belize, British Honduras, on Feb- 

 ruary 17, entering Guatemala at El Cayo, and traversed the country to Flores 

 on Lake Peten and the region in northeastern Guatemala, north of these 

 points, returning to Belize on April 28. (For abstract of report on results 

 obtained, see pp. 261 to 262.) At the conclusion of this work, Mr. Love resmned 

 the reoccupation of stations in Central America, going by way of Puerto 

 Barrios and Puerto Cortez to Trujillo, Honduras. Difficulties in transporta- 

 tion made it necessary to omit the stations along the coast and proceed 

 directly to Port Limon, from which stations in Nicaragua, including Blue- 

 fields, Prinzapulca, Greytown, Granada, and Managua, were easily reached. 

 He made observations at Guatemala City in accordance with the special 

 program for the solar eclipse of September and then continued observations 

 at secular-variation stations in Guatemala, Panama, and Costa Rica. 



Special magnetic and atmospheric-electric observations were made at 

 Point Loma, California, during the eclipse of September 10 by a party 

 organized by Captain J. P. Ault, assisted by Observer H. F. Johnston, the 

 latter having charge of the atmospheric-electric observations. Magnetic 

 observations were also made by Captain Ault at Mount Wilson, and the 

 special eclipse program in declination was carried out by Dr. Gustav Stromberg, 

 of the Mount Wilson Observatory, assisted by Mr. Thomas Mulvin. 



In cooperation with Captain Donald B. MacMillan, Observer R. H. 

 Goddard was assigned as a member of the MacMillan North Greenland 

 expedition, which left Wiscasset, Maine, on June 9, for Etah, North Green- 

 land, and Ellesmere Land. Mr. Goddard made magnetic observations on the 

 outward voyage at Sydney, Nova Scotia, and at Battle Harbor and other 

 points on the Labrador coast. According to the latest radio advices (November 

 10), observations were made by Mr. Goddard at Godhavn, Etah, and Refuge 

 Harbor, Greenland, and the temporary observatory for magnetic and electric 

 registrations, beginning October 19, was built at the last-named station. 



Cooperative magnetic and atmospheric-electric work with the Maud 

 expedition of Captain Amundsen (see p. 276 of last year's report) during the 

 drift of the Maud across the Polar Sea was continued. According to radio 

 advice received December 1, the Maud was then in latitude 75° 13' north and 

 in longitude 159° east, and the observational work, in charge of Dr. H. U. 

 Sverdrup, was progressing splendidly. 



