320 CARNEGIE INSTITUTION OF WASHINGTON. 



and horizontal intensity. Atmospheric-electric observations of the 

 five elements were carried out on 3 days and of all elements except the 

 radioactive content on 7 other days; 24-hour series diurnal-variation 

 observations were made on 3 days. 



The marked changes and improvements in the methods, instruments, 

 and equipment provided for ocean observations since the cruise of the 

 Galilee 16 years ago are extremely gratifying. The Galilee made the 

 passage from San Diego to Honolulu in 12 days during the year 1905, 

 covering much the same region as the Carnegie covered this time. 

 Thirteen stations were occupied then, as contrasted to 41 on the 

 Carnegie^ s trip. 



During the stay at Honolulu, a complete series was obtained of 

 comparisons between the magnetic standards aboard the Carnegie 

 and those at the Honolulu Magnetic Observatory of the United States 

 Coast and Geodetic Survey. Additional capacity determinations 

 were made for the ion counter, the radioactive apparatus, and the 

 conductivity apparatus. 



After completion of the comparisons at the Honolulu Magnetic 

 Observatory, the Carnegie sailed on April 28, and upon rounding the 

 island of Oahu ran into the northeast trade-wind, which held until 

 parallel of 34° north latitude. Westerly and northerly winds generally 

 prevailed as the vessel sailed eastward along this parallel. On May 

 13 the northeast trade-wind was picked up again and then a south- 

 easterly course was steered until May 21, when it was changed to a 

 southwesterly one direct for the Samoan Islands. The Carnegie 

 entered the region of the ''doldrums" on May 27 and left it on May 29 

 with a light southeast wind which continued with variable force all the 

 way to Pago Pago, but grew quite strong two days before the port was 

 reached. 



On June 12 a stop of a few hours was made at Penrhyn Island, 

 which is a typical coral atoll The brief visit ashore was a welcome 

 relaxation and enabled the party to secure some coconuts and Raro- 

 tonga oranges. A stop of a few hours was also made at Manihiki 

 Island on June 15, and fresh fish, eggs, and coconuts obtained. 



The Manua Islands were sighted early on June 20, and by 6'' 20'" on 

 the same evening the vessel was moored to the buoy in Pago Pago 

 Harbor. After setting up the rigging and replenishing stores, the 

 Carnegie left Pago Pago in the afternoon of June 28 and arrived off 

 Apia the following morning. The total distance to Apia was 5,980 

 miles, which makes an average of 110.7 miles per day for the 54 days 

 of sailing. 



Winds were usually quite favorable throughout the passage, though 

 never very strong; no storms were encountered and observing conditions 

 were excellent. Declination observations were made on every day 

 but one, usually twice a day. The total number of stations was 96; 



