Obser\'ers' Field Reports 



119 



I left Mollendo, Peru, on January 14, arri\nng at Arica, Chile, on the 15th, observing 

 there on the 16th and morning of the 17th. Thence the stations were occupied as shown 

 in the above list. At Valparaiso, through the kindness of the late Dr. F. Ristenpart, the 

 corrections of my timepieces on standard time were obtained. The total travel amounted 

 to about 3,190 miles, of which 1,440 were bj' steamer and 1,750 by railroad. Per station, 

 the average travel was 168 miles, and the average field time was 3.4 days. 



W. H. Sligh, on Magnetic Work in Asia Minor, India, Egypt, and Sudan, 



January 1910 to June 1911. 



In accordance with instructions of December 29, 1909, I left Washington on that day, 

 sailing from New York on January 1, 1910, and arriving at Constantinople on January 14. 

 The instnmiental outfit used was as follows: magnetometer No. 7, dip circle No. 202, 

 pocket chronometer No. 257, watches Nos. 70 and 71, and observing-tent No. 17. At Con- 

 stantinople Observer Pearson delivered to me, for determining altitude, a boiling-point 

 apparatus, provided with thermometers Nos. 3552 and 3556. 



During the trip 84 stations were occupied, as follows: 



1. Constantinople, Turkish Empire. 



2. Jaffa, Turkish Empire. 



3. Jerusalem, Turkish Empire. 



4. Jericho, Turkish Empire. 



5. Haifa, Turkish Empire. 



6. Dera'a, Turkish Empire. 



7. Damascus, Turkish Empire. 



8. Beirut, Tuikish Empire. 



9. Madain-Saleh, Turkish Empire. 



10. Tebook, Turkish Empire. 



11. Ma'an, Turkish Empire. 



12. Katrane, Turkish Empire. 



13. Kuteifeh. Turkish Empire. 



14. Nebk, Turkish Empire. 



15. Karietein, Turkish Empire. 



16. PalmjTa (Tadmor), Turkish 



Empire. 



17. Ain-el-Bieda, Turkish Empire. 



18. Homs, Turkish Empire. 



19. Ummerdjim, Turkish Empire. 



20. .'Vleppo, Turkish Empire. 



21. Birejik, Turkish Empire. 



22. .A.intab, Turkish Empire. 



23. Marash, Turkish Empire. 



24. Osmanie, Turkish Empire. 



25. Adana, Turkish Empire. 



26. Mersina, Turkish Empire. 



27. Lamaca. Island of Cyprus. 



28. Alexandretta, Turkish Empire. 



29. Latakia, Turkish Empire. 57. 



30. Rhodes, Turkish Empire (Island 58. 



of Rhodes). 59. 



31. SmjTna, Turkish Empire. j 60. 



32. Aidin, Turkish Empire. 61. 



33. Denizli, Turkish Empire. | 62. 



34. Alashehr, Turkish Empire. 63. 



35. Ushak, Turkish Empire. 64. 



36. Afiumkarahissar, Turkish Empire. 65. 



37. Tchaouchdjikeuy, Turkish Empire. 66. 



38. Konia, Turkish Empire. i 67. 



39. Eregli, Turkish Empire. 68. 



40. Eskishehr, Turkish Empire. ' 69. 



41. Adabazar, Turkish Empire. 70. 



42. Dardanelles, Turkish Empire. , 71. 



43. Tcherkeskioi, Turkish Empire. j 72. 



44. Adrianople, Turkish Empire. 73. 



45. Sazelar, Turkish Empire. | 74. 



46. Angora, Turkish Empire. 75. 



47. Kirshehr, Turkish Empire. | 76. 



48. Kaisariyeh, Turkish Empire. j 77. 



49. fSivas, Turkish Empire. j 78. 



50. Malatia, Turkish Empire. 79. 



51. Kharput, Turkish Empire. , 80. 



52. Egin, Turkish Empire. ' 81. 



53. Gemakh, Turkish Empire. 82. 



54. Erzingan, Turkish Empire. 83. 



55. Mamakhatun, Turkish Empire. 84. 



56. Erzerum, Turkish Empire. ] 



Madrak, Turkish Empire. 



Kirs, Turkish Empire. 



Bitlis, Turkish Empire. 



Sert, Turkish Empire. 



Jezireh-ibn-Omar, Turkish Empire. 



Nisibin, Turkish Empire. 



Diarbekir, Turkish Empire. 



Mosul, Turkish Empire. 



Kaleh Shergat, Turkish Empire. 



Tekrit, Turkish Empire. 



Bagdad, Turkish Empire. 



Ramadieh, Turkish Empire. 



Anah, Turkish Empire. 



Hillah, Turkish Empire. 



Amara, Turkish Empire. 



Basra, Turkish Empire. 



Muscat, Turkish Empire. 



Karachi, India. 



Alibag, India. 



Aden, Turkish Empire. 



Massawa, Eritrea. 



Port Sudan, Anglo-Egj'ptian Sudan. 



Suakin, Anglo-Egyptian Sudan. 



Hodeida, Tiu'kish Empire. 



Jidda, Turkish Empire. 



Tor, Egypt. 



Suez, Egypt. 



Helwan, Egypt. 



Intercomparisons of instruments were made in the field with Mr. Pearson at Robert 

 College, Constantinople, under great difficulties becau.se of high wind, rain, and cold, and 

 at the magnetic observatories located at Alibag (near Bombay), India, and at Helwan, 

 Egj-pt. Mr. Pearson's stations at Basra (No. 72), Aden (No. 76), and Suez (No. 83) were 

 reoccupied. 



On February 3, 1, with my interpreter, sailed from Constantinople, arriving at Jaffa 

 Syria, February 8, where observations were made February 9 and 10. On February 11 

 we went by rail to Jerusalem, securing observations on February 12. A station at Jericho 

 appeared desirable on account of the peculiar geographical conditions, and a trip was made 

 there from Jerusalem. We arrived in Damascus February 25, going via JafTa, Haifa, and 

 Dera'a and observing en route at Haifa and Dera'a. With the assistance of the American 

 consul general at Beirut, Mr. G. B. Ravndal, who happened to be at Damascus, permis- 

 sion was obtained from the Vali to go as far south as Madain-Saleh. Christians are not 

 allowed to go beyond this point. 



