288 CARNEGIE INSTITUTION OF WASHINGTON. 



turbance effects on normal distribution over the area covered by the 

 swings are probably less than the order of error of observations for 

 results on shipboard. 



Mr. Duvall made declination observations on May 28, 29, and 30, 

 1919, at the Standardizing Magnetic Observatory in Washington, in 

 accordance with the special eclipse program. 



SOUTH AMERICA. 



In connection with the program of special magnetic observations 

 during the eclipse of May 29, 1919, Dr. H. M. W. Edmonds and Assis- 

 tant Observer F. G. Rosemberg obtained between April 11 and June 

 14 complete magnetic observations at the C. I. W. primary and 

 secondary stations of 1917 at Huancayo, at the C. I. W. 1917 station at 

 Huayao, and at the special eclipse station at Huayao for controlling 

 the special variometer work. 



Observer A. Sterling was assigned early in the year to carry out a 

 series of observations at stations in Chile and in Patagonia, Argentina, 

 to include reoccupations of stations occupied during 1913 by the 

 Meteorological Service of Argentina and during 1917 by the Department 

 in Argentina and Chile. After the necessary preparations, including 

 conferences with officers of the Pan-American Union at Washington 

 and with Professor Bailey Willis at New York, Mr. Sterling sailed on 

 February 25 from New York for Valparaiso, where he arrived March 

 19. After making reoccupations of the C. I. W. 1913 stations at San- 

 tiago and Puerto Montt, Chile, he sailed on March 30 from the latter 

 point for Punta Arenas, Chile, where he arrived April 6. He pro- 

 ceeded from Punta Arenas, about April 19, after occupying stations 

 there and at Last Hope Inlet, northward to Gallegos and Puerto 

 Deseado; the special eclipse program was carried out on May 29, 1919, 

 at the latter place. He arrived at Buenos Aires early in July and thence 

 again took up work to the south as far as Puerto Madryn. Unusual 

 floods occasioned some delay in this portion of the work. Returning 

 to the office via Buenos Aires, Mr. Sterling made observatory inter- 

 comparisons at the Vassouras Observatory of the National Observatory 

 of Brazil under the direction of Dr. H. Morize. This expedition, com- 

 pleted in October 1919, furnishes valuable data at secular-variation 

 stations and at a sufficient number of new stations to complete, in con- 

 nection with the previous work of the Meteorological Service of Argen- 

 tina and of the Carnegie Institution of Washington, the general mag- 

 netic survey of the southern portion of South America. 



Observer D. M. Wise, with the assistance of Observer Andrew Thom- 

 son and incidentally to the program of special magnetic and atmos- 

 pheric-electric observations at Sobral, intrusted to his party in con- 

 nection with the total solar eclipse of May 29, 1919 (see p. 290), 

 secured magnetic observations at the following stations: Quixadd, 



