222 Land Magnetic Observations, 1914-20 



The study of the region about Battle Harbor on the Labrador coast has been referred 

 to under the report of the Hudson Bay expedition of Messrs. W. J. Peters and D. W. 

 Berky. Other studies were made by the Carnegie party at Guam and at Easter Island 

 in connection with the regular work of the vessel. 



Standardizing Observations. In addition to the comparisons made at observatories 

 in the course of field work, or on journeys to and return from the field, special arrange- 

 ments have been made at other times to secure the desired correlation of standards. 

 In June 1915 Mr. H. W. Fisk made an extended series of comparisons with the standards 

 at Cheltenham, using magnetometer-inductor No. 26 for all three elements. This series 

 was supplemented in January 1917 for inclination by Mr. H. R. Schmitt's observa- 

 tions, using the same instrument. 



At the Standardizing Magnetic Observatory on the grounds of the Department in 

 Washington, D. C, careful comparisons are made between the standard instruments and 

 those which are to be sent out for field use. These comparisons are repeated on the 

 return of the instruments from the field, the observations with the field instrument being 

 in general made by the field observer so as to correct for any personal equation arising 

 from the manner of using the instrument, while the observations with the standard are 

 made as nearly simultaneously as possible by another observer. In a similar way com- 

 parisons have been made with instruments of other organizations. Magnetometer No. 

 40 of the United States Coast and Geodetic Survey was compared in March 1918 by Mr. 

 W. W. Merrymon and members of the Department staff; in November and December 

 1915 Mr. C. A. French of the Dominion Observatory, Canada, and Mr. W. E. W. Jackson 

 of the Meteorological Service of Canada secured comparisons, with the assistance of the 

 Department staff, between instruments of their respective organizations and those of the 

 Department. 



Eclipse Parties. Observers who are in the field have made prescribed special obser- 

 vations, and references to these are found in their respective field reports. Parties 

 organized especially for work during eclipses have in most cases secured regular station 

 observations at one or more points in addition to the special eclipse observations, which 

 are usually confined to eye-readings of declination. At the time of the eclipse of June 8, 



1918, observations of this kind were obtained by Dr. L. A. Bauer at Corona, Colorado; 

 by Mr. W. J. Peters at Lake Moraine, Colorado; by Messrs. H. W. Fisk and C. C. Ennis 

 at Goldendale, Washington; by Dr. C. W. Hewlett at Brewton, Alabama; by Professor 

 H. M. Kuehne of the University of Texas at a station near Austin, Texas; and by 

 Brofessor G. L. Hosmer of the Massachusetts Institute of Technology, at Woburn, near 

 Boston, Massachusetts. At Lakin, Kansas, a magnetograph outfit was set up and kept 

 in operation for about one month by Mr. D. M. Wise. During the eclipse of May 29, 



1919, special 'observations with magnetograph installations were made at Sobral, Brazil, 

 by Mr. Wise, and at Huayao, Peru, by Dr. H. M. W. Edmonds. Dr. L. A. Bauer, 

 accompanied by Mr. H. F. Johnston, made' a special series of observations for the three 

 elements at Cape Palmas, Liberia, and at supplementary stations in the neighborhood. 

 Special declination series during the eclipse of May 29, 1919, were also obtained by Mr. 

 F. Brown at Campo, Cameroun, by Mr. C. R. Duvall at Washington, D. C, and by A. 

 Sterling at Puerto Deseado, Argentina (see p. 200). 



