290 CARNEGIE INSTITUTION OF WASHINGTON. 



the following cablegram was received from the Carnegie: "All are 

 well. Careful search has been made for Royal Company Islands with- 

 out jesult. Fifty-four magnetic stations." Standardization observa- 

 tions were made for determination of instrumental constants at the 

 Magnetic Observatory in Christchurch and intercomparisons of stand- 

 ards with those of the observatory were also obtained. 



Throughout the cruise of the year, even in bad weather and under 

 disagreeable conditions, the regular program of observational work 

 was carried out. Magnetic observations and atmospheric-electric 

 observations were made in accordance with the prescribed programs, 

 complete diurnal-variation series for three or more electric elements 

 being obtained at least twice each month in addition to the daily 

 forenoon observations. In this connection it is of interest to note 

 that the special potential batteries which were provided for this 

 cruise (see pp. 297 and 300 of annual report for 1919) have thus far 

 proved entirely satisfactory and have shown no signs of deterior- 

 ation. The roll-and-pitch recorder has been used throughout the 

 cruise to obtain records of the ship's motion; owing, however, to the 

 large amount of cuiTent required for its operation and the constant 

 attention necessary, such records have been confined to periods of 

 half an hour in the middle of the magnetic observations. Some 

 highly interesting records have been obtained and furnish valuable 

 data for studies on dynamic deviations aboard ship (see p. 300). 

 Tables 1 and 2, pp. 310-311 contain summaries of the preliminary 

 results of the ocean magnetic observations on the Carnegie for Cruise VI 

 from Hampton Roads to Fremantle, October 1919 to September 1920. 



As opportunity afforded observations were made also to detect ocean 

 currents in accordance with the method originated by Dr. A. G. Mayor; 

 cloud photographs were taken in accordance with suggestions from Pro- 

 fessor W. J. Humphreys, of the United States Weather Bureau; and 

 rock specimens were collected at ports of call for the studies of Dr. H. S. 

 Washington of the Geophysical Laboratory. 



1;^ The personnel of the Carnegie party is as follows: J. P. Ault, chief 

 of section of ocean work, in command; H. F. Johnston, magnetician, 

 second in command ; Russell Pemberton, surgeon-observer; A.Thomson, 

 H. R. Grummann, and R. R. Mills, observers; A. Erickson, first watch- 

 officer; C. E. Layer, engineer; L. Larsen, second watch-officer; 

 C. Strom, third watch-officer; 2 cooks; 1 mechanic; 8 seamen; 2 cabin 

 boys; in all 23 men. 



LAND-SURVEY WORK AND INSPECTION WORK.i 



As already stated on page 279, owing to the greatly increased cost 

 of field-work and the necessity of maintaining the Carnegie in full 

 commission, the land-survey work had to be restricted during the year; 



'From the report of the Chief of the Magnetic Survey Division, J. A. Fleming. 



