Observers' Field Reports 



79 



sons with the observatory at Bouzareah, Algiers, and from the time-signals received from the 

 Eiffel Tower, Paris, bj' wireless at In-Salah. From In-Salah to Gao, the longitude of which 

 was accepted as furnished by the French authorities at that place, all longitudes are derived 

 from a discussion of the times by the several watches carried, two of which behaved with 

 remarkable consistency. Every care that could be thought of was given to the handling of 

 the timepieces, and it is believed that about as good results as are possible by the method 

 adopted were obtained. However, one refinement of care in the maintenance of uniform 

 rates we did not practice, as it had not occurred to us. This was the plan of Captain 

 Tilho, who, at every halt of his expedition, had natives march up and down all day 

 with the timepieces, so that they might always be subjected to the same conditions. 

 The longitude of Timbuktu by Captains Jordan and Harranger was obtained by tele- 

 graphic comparison with Dakar, which place is very accurately determined, having been 

 checked against both Paris and Cape Town. 



List of Slalions, Trans-Saharan Expedition, 1912-1913. 



13th encampment south of In-Salah. 



Tesnou, 15th encampment south of In-Salah. 



16th encampment south of In-Salah. 



17th encampment south of In-Salah. 



18th encampment south of In-Salah. 



19th encampment south of In-Salah. 



In-Amguel. 



2l3t encampment south of In-Salah. 



Tit. 



23d encampment south of In-Salah (Tamanrasset). 



24th encampment south of In-Salah. 



Fort Motylinski. 



Talanteidi. 



27th encampment south of In-Salah. 



Tegueneouen, 28th encampment. 



Hassi Amalaouly, 29th encampment. 



Amselkat, 30th encampment. 



31st encampment south of In-Salah. 



32d encampment south of In-Salah. 



33d encampment south of In-Salah. 



35th encampment south of In-Salah. 



38th encampment south of In-Salah. 



Tadeini, 40th encampment. 



42d encampment south of In-Salah. 



44th encampment south of In-Salah. 



46th encampment south of In-Salah. 



48th encampment south of In-Salah. 



Hassi Yerlick, 51st encampment. 



53d encampment south of In-Salah. 



Kidal, 55th encampment. 



Oued Eguerer, 2d encampment south of Kidal. 



In-Tassik, 4th encampment south of Kidal. 



6th encampment south of Kidal. 



Gao. 



Bourem. 



Bamba. 



Yoro. 



Timbuktu, A and B. 



Explanatory notes. Hassi, Arab term for well, in names of stations denotes a well. Oued means a drainage basin or 

 valley; in these, pasturage, if there is any, is found. Inhabited points and posts at which observations were made were: 

 Touggourt, El Bour N'Goussa, Ouargla, El-Golea, Foggaret-ez-Zoua, In-Salah, In-Amguel, Tit, Tamanrasset (23d encamp- 

 ment south of In-Salah), Fort Motylinski, Kidal, In-Tassik, Gao, Bourem, Bamba, and Timbuktu. The other points 

 named are wells or pasturages. 



In concluding this report, I wish to acknowledge the good service rendered by my chief 

 assistant, Observer H. E. Sawj-er, and desire also to mention the efficient service of the two 

 guides, Josef ben Saad and Isa ben Saad, and of the hunters and caravaneers, Milhoud, Ali 

 ben Kaddour, and Bershea. 



