122 



Land Magnetic Observations, 1911-13 



W. H. Sligh, on Magnetic Work in the Balkan States, Turkey, and Italy, 



June to November 1911. 



In accordance with instructions dated October 28, 1910, and March 31, 1911, I set out 

 from Cairo, Egypt, on June 7, 1911, with the following instrumental outfit: magnetometer 

 No. 7; dip circle No. 202; observing-tent No. 17; pocket chronometers Nos. 244 and 257; 

 watch No. 70; boiling-point apparatus, for determining altitudes, with thermometers Nos. 

 3552 and 3556. 



During this expedition 21 stations were occupied, as follows: 



15. Candia, Island o( Crete. 



16. Zante, Greece (Island of Zante). 



17. Patras, Greece. 



18. Corfu, Greece (Island of Corfu) 



19. Terracina, Italy. 



20. Rome, Italy. 



21. Valetta, Island of Malta. 



At Con.'stantinople, owing to the erection of a building, the sites of the earlier stations 

 of the Department could not be reoccupied. A new site was, therefore, selected about 

 a half mile away; at Athens, intercomparisons of instruments were made at the magnetic 

 observatory there and the observatory station at Kephisia was reoccupied; at Terracina, 

 Italy, intercomparisons were secured with the magnetic standards of Italy. At Constan- 

 tinople letters of recommendation were obtained from the Bulgarian, Serbian, and Grecian 

 legations. Letters were also obtained for the various vilayets in European Turkey. Mr. 

 George C. Turner, an Englishman, was employed as interpreter for the expedition. 



We set out by rail from Constantinople, June 29, going to Burghas, Bulgaria, via 

 Adrianople and Philippopohs. Magnetic observations were made at Burghas and at the 

 4 following stations. Then we went to Uskub, where we were most kindly received by the 

 vali, who gave us letters to the authorities at Mitrovitsa, our next station, which was 

 followed by Salonica and Monastir. Leaving Salonica July 27, and making observations 

 at Drama and Dede-Agach, we returned to Constantinople July 30, having been gone 31 

 days, during which 11 stations were occupied and about 2,5.50 miles covered by rail. 



We sailed from Constantinople for Athens August 1, being quarantined 5 days at 

 Salamis. After the completion of the intercomparisons at the Athens Observatory and the 

 observations at Kephisia, we sailed from Piraeus September 1, going to Candia and from 

 there to Zante, via Piraeus. At Patras the interpreter returned to Constantinople and I 

 proceeded to Rome, where, through the courtesy of Professor Palazzo, the director of the 

 Meteorological and Magnetic Service of Italy, my instruments were cleaned and repaired 

 at the observatory. Though Professor Palazzo was very busy at the time, he went with 

 me to Terracina and took part in the intercomparisons of our respective instruments. I 

 also made magnetic observations at Rome; having completed this work, I was obliged to 

 take a rest here of about 17 days. Leaving Rome November 1, for Malta, I was quaran- 

 tined there for 5 days. Observations were made at Valetta, Malta, November 11 and 14, 

 my last station on this trip. About 6,300 miles were traversed, 2,500 by steamship and 

 3,800 by railroad. 



W. H. Sligh, on Magnetic Work in Northwestern Africa, Tunis to Sierra Leone, 



November 1911 to December 1912. 



In accordance with instructions of March 13, 1911, I set out from Valetta, Malta, 

 November 16, 1911, with the following scientific outfit: magnetometer No. 7; dip circle 

 No. 202 ; observing-tent No. 17; pocket chronometers Nos. 226 and 244; watch No. 102; and 

 boiling-point apparatus provided with thermometers Nos. 3552 and 3556, for altitude 

 determinations. Observer D. W. Berky joined the party at Gibraltar on March 28, 1912. 



