248 CARNEGIE INSTITUTION OF WASHINGTON. 



During the stay of over one month at Callao, a complete program 

 of intercomparisons of instruments was carried out at a former C. I. W. 

 station at Lima. On March 29, 1918, the vessel set sail for Balboa, 

 Canal Zone, arriving there on April 24, 1918, after making another 

 detour to the westward to cover unsurveyed regions. On May 2, 

 1918, the Carnegie for the second time passed through the Panama 

 Canal, this time from the Pacific to the Atlantic. 



After a stay of 9 days at Cristobal, during which an intercomparison 

 of instruments was again made, the Carnegie started out on the final 

 part of her journey homeward on May 11, 1918. Owing to light winds 

 and adverse currents some difficulty was experienced in clearing the 

 coast of Panama. Conditions were also unfavorable for making the 

 route called for to the eastward through the Caribbean Sea, so that it 

 was necessary to set the course westward and return through the Gulf 

 of Mexico and the Straits of Florida. On June 4, 1918, the vessel 

 arrived at Newport News. 



On June 8, 1918, the Carnegie left Newport News for Washington, 

 where she arrived on June 10, 1918, after spending a day in swinging- 

 ship observations in Chesapeake Bay. Declination observations were 

 also made in the bay and in the Potomac River. The trip from Old 

 Point Comfort to Washington was made entirely under the vessel's 

 own power. Thus after an absence of nearly three and one-half years 

 the Carnegie was once more in a home port on the Atlantic coast. 



During this Cruise V, the Carnegie traveled over 13,786 miles of 

 ocean, and the daily average for the 122 days at sea was 113 miles. 

 Tracks of former cruises by this same vessel were crossed 10 times and 

 Galilee tracks were crossed 3 times, thus furnishing further valuable 

 information regarding secular variation. 



As usual, observations for magnetic intensity and inclination at 

 sea were made daily, regardless of sea and weather. Magnetic-declina- 

 tion results were obtained every day but four, which were too cloudy 

 for these observations. 



The ship's personnel during November 1917 to the close of Cruise 

 V in June 1918 was as follows: Dr. H. M. W. Edmonds, magnetician 

 and surgeon and in command of vessel; A. D. Power, magnetician and 

 second in command; B. Jones, L. L. Tanguy, and J. M. McFadden, 

 observers; W. E. Scott, stenographer-recorder; A. Beech, first watch 

 officer; M. G. R. Savary, engineer; L. Larsen and A. Erickson, second 

 and third watch officers, respectively; C. Heckendorn, mechanic; 8 

 seamen, 2 cooks, and 2 cabin boys; the complete personnel at any one 

 time thus consisted of 23 persons. 



The atmospheric-electric observations were continued throughout 

 the cruise. 



Table 2 contains the preliminary results of ocean magnetic observa- 

 tions on the Carnegie for Cruise V from Buenos Aires to Washington, 

 D. C, December 1917 to June 1918. 



