264 CARNEGIE INSTITUTION OF WASHINGTON. 



Observer D. W. Berky, with his chief assistant, Observer H. E. 

 Sawyer, and party left Biskra, Algeria, for the Trans-Saharan Expe- 

 dition on October 29, 1912. The caravan, as finally organized, left 

 Ouargla on November 20 and arrived without mishap at In-Salah 

 on December 24. After the observational work and the necessary 

 details in connection with the business of the expedition had been 

 completed, the party left In-Salah on January 2, for the more diffi- 

 cult portion of the expedition. The French post. Fort Motylinski, 

 was reached on February 10, and, after resting of party, the expedi- 

 tion was resumed on February 15 and arrived without serious mishap 

 at the Sudanese mihtary post Kidal on March 27; here a wait of 

 about two weeks occurred on account of delay in the arrival of the 

 military escort and because of unsettled conditions. The party left 

 Kidal on April 10 and reached the Niger River at Gao on April 19. 

 From this point the observers traveled by canoe to Tim^buktoo, where 

 they arrived on May 12. Observations were made at 72 stations en 

 route from Biskra to Timbuktoo, Between the date of arrival at 

 Timbuktoo and July 21, the party was engaged in disbanding the 

 caravan, computing and dispatching the observations, and making 

 the necessary preparations for the extension of the work 



On July 21 Mr. Berky resumed the observational work along the 

 Niger River into Nigeria and Dahomey. Mr. Sawyer left Timbuk- 

 too at the same time for Dakar, Senegal, where he arrived towards 

 the end of October, having made magnetic observations at a number 

 of points in Senegal. The work, both along the Niger and the 

 Senegal Rivers, was greatly retarded owing to the exceptionally low 

 stage of the water. The total number of stations during the fiscal 

 year will be about 130, and will include a number of valuable secular 

 variation stations. This important work in Africa has been greatly 

 faciUtated by the very cordial and prompt assistance rendered by 

 the French and English governments. 



At the end of the year, Mr. W. F. Wallis, one of the most experi- 

 enced magneticians of the Department, was en route to Tripoli to 

 take charge of the magnetic survey work in North Africa. 



Australasia. — ^The general magnetic survey of Australasia, under 

 the charge of Observer E. Kidson, has been considerably extended 

 during the present year. Mr, F. W. Cox served as Assistant Observer 

 until the end of February. Early in July Assistant Observer 

 F. Brown reported to Mr. Kidson and has since been assisting him 

 in the survey work. From November 1 to September 15, 72 stations 

 were occupied: 29 in Queensland, 17 in Victoria, 34 in New South 

 Wales, and 2 in the Federal Territory. The general magnetic sur- 

 veys of New South Wales and Victoria have now been practically 

 completed. The work from September 15 to October 31 was in 



