DEPARTMENT OE TERRESTRIAL MAGNETISM, 20$ 



near Cape Town. Barometer comparisons were made with the standards of 

 the Royal Observatory, Cape of Good Hope. At Cape Town Dr. H. M. W. 

 Edmonds, Surgeon and Magnetician, and H. F. Johnston, Magnetic Observer, 

 joined the vessel. Dr. C. C. Craft, who had been Surgeon and iMagnetic 

 Observer on board the Carnegie since the initiation of her work, was relieved 

 of sea duty at Cape Town to return to the office, owing to the very poor 

 condition of his eyes. 



Upon the completion of the intercomparisons at Cape Town, the Carnegie 

 left for Colombo on April 26, arriving there June 7, 191 1. The course from 

 Cape Town was made for St. Paul Island, and thence directly for Colombo. 

 This passage of the cruise was accomplished with cloudy weather and heavy 

 sea during the westerly course, and under fine conditions during the north- 

 erly course. Observations were made nearly every day. At Colombo the 

 Director met the vessel for the purpose of a general inspection and for con- 

 sultation with the commander as to the details of the work, and for discus- 

 sion regarding such alterations as might be deemed advisable for further 

 improvement. Magnetic Observer E. Kidson, who had been observer on 

 board the Carnegie since the initiation of her work, was relieved of sea duty 

 at Colombo and proceeded at once to Australia to take up there the magnetic- 

 survey work, as elsewhere stated. 



Having completed the intercomparisons at Colombo of the land and sea 

 instruments and the barometric standards at the meteorological observatory, 

 the Carnegie set sail on July 6, 1911, for Port Louis, Mauritius Island, 

 with the Director aboard, arriving there August 5 on schedule time. This 

 portion of the cruise was made, with the exception of a few days, under 

 very favorable conditions. Valuable observations (63 determinations), both 

 with regard to the distribution of the magnetic elements and their secular 

 changes, were secured, the course to Mauritius being deflected to the south- 

 ward in order to reach the track of the Gauss (see general summary). On 

 this portion also the track of the Carnegie northward to Colombo from St. 

 Paul Island was crossed, and thus valuable opportunity was afforded for 

 testing the accuracy of her work as well as chart errors found. The results 

 of these tests were found very satisfactory. Intercomparisons of land and 

 sea instruments, as well as a valuable intercomparison of the standards of 

 the Department and those of the Royal Alfred Observatory, were secured. 



The land work being completed, the Carnegie left Port Louis, bound for 

 Batavia via Colombo, on August 16, 1911, the Director continuing with the 

 vessel. A short stop was made at Colombo, during September 10 to 15, and 

 there the Director left the party to visit magnetic organizations and observa- 

 tories in India, the East Indies, and China. Excellent conditions prevailed 

 between Mauritius and Colombo and 61 magnetic determinations were made. 

 After a 43 days' cruise from Colombo, during which the desired observations 

 were secured, Batavia was reached on October 27, 191 1. The course from 

 Mauritius carried the party first to the westward of the Seychelles Islands 

 into the western part of the Arabian Sea, where the agonic was located by 



