appe:n^dix a 



traverses, adjusted to the astronomically determined posi- 

 tions of Eil-ad, Seyera, Shimbirleh, Wangema Mogal, Guratti, 

 Jara, Gonia Iddu, Gulola, Jeldez, Robleh, Liboyi, Tur Guda, 

 Sereda, Eil-adi, Haryel, Melka Waja, Melka Dera, Melka 

 Gela (Boran boma) and Marti Plateau. The latitudes for 

 these places were obtained from north and south stars, or 

 sun circum-meridian observations, and, in the case of Haryel, 

 by double altitudes of the sun (Ivory's formula). 



Longitudes are from chronometric differences by east 

 and west stars, or by the mean of observations to the sun 

 east and west of the meridian, and depend on the position of 

 Kismayu Island (Observation Point), which is given by the 

 B.E.A. Survey Office as in latitude o° 23' 6" S., and longitude 

 42° 33' 31" E. 



Azimuth observations were taken from time to time 

 when any distant object could be seen, and the magnetic 

 variation was found to vary between 9° W. and 5° 45' E., 

 the latter being the deflection of the needle at Marti 

 Plateau. 



All these observations were taken with a 4-inch theodolite 

 fitted with Reeves' tangent micrometers, which, in spite of 

 the rough usage to which it was unavoidably exposed, 

 rendered every satisfaction. 



Heights are from boiling-point and aneroid observations, 

 depending on the altitude of Mark Hill, Kismayu (140 feet), 

 as given on the Admiralty Chart. 



Two short lines of levels were run, one near Seyera in 

 order to prove the impossibility of the Guranlagga rising 

 there and flowing southwards, and the other to the east of 

 Melka Waja to satisfy myself of the possibility of an outflow 

 from the Lorian Swamps during the rainy season. The 

 method adopted was that described on page 180 of the ninth 

 edition of the Hints to Travellers. But owing to the 

 levelling staff being very primitive, the results could only 

 be approximations, though they sufficed to show that my 

 theories were correct. 



The forms lines are extremely rough, and were put in by 

 the help of an aneroid and hypsometer merely to show the 

 approximate relief of the country. 

 U 305 



