The physiography of the river Nile and is basin . ell asthe valleys of the principal rivers; Dove would include also the basinof lake Tsana. The Woina Dega forms the greatest |)art of the Abyssinian ])latcausince the mountain masses of the Dega are confined to Simicn,Mount Guna, and the Chok mountains in Gojam and a few otherlocalities. The low country between the ]ilate^u and the Ked Sea known asthe Samhar is climatologically distinct from the rest of the Abyssinianarea since it has winter rains, instead of the summer monsun rains ofthe rest of the country. Temperature.—The highest teni])erat


The physiography of the river Nile and is basin . ell asthe valleys of the principal rivers; Dove would include also the basinof lake Tsana. The Woina Dega forms the greatest |)art of the Abyssinian ])latcausince the mountain masses of the Dega are confined to Simicn,Mount Guna, and the Chok mountains in Gojam and a few otherlocalities. The low country between the ]ilate^u and the Ked Sea known asthe Samhar is climatologically distinct from the rest of the Abyssinianarea since it has winter rains, instead of the summer monsun rains ofthe rest of the country. Temperature.—The highest teni])erature is met with on the])lains of the Sudan and here we find also the greatest range of tem-perature since the dry clear air allows rapid radiation at night. Inthe Samhar high temperatm-es also occur but the air is damp from theproximity of the sea and the range is nnich less. Wad Medani onthe Blue Nile, and Massaua on the Red Sea are typical stations of thesetwo areas. Wad MeSani. (i;t()2-1904).Lat. 14- 24 N. ;W ;il R. Alt. 41(I IVt. Milt. Krgnnziiiitslieft, No. 97. (uitlia, l.^^.SJ. Massaua. (May 188.)-April )Lat. 3(i 4tt N. Altitlde. 1.»5 metres. Me»n MfiiiiMMxiimiiJi Kaii^i- .TniuKiry l<l)ruary Marcli May .. Jiiiii- July Augu.^t Soi)teinl)<r October November ] )eccmber c ;2i;()31-3 33 T)3v8 34 733-331-7 • ;• 27-0 28-; 30 Ml32 T)34-737-a38-738 M)3(1-53r)M)32-130-5 22-523 Ml24-125-828MI ;31-631-42itfl28-225-023-2 (;-4 tlMl(?)•) (.•7 (;-7 7-9 7-1 ()M, (;-8 Cm;7-3 Year 30-3 33-8 2G-!t The fall of teniperiiture nt Wnd Medaui in June-September duringtlie summer rains is not experienced at Massaua where the maximumis reached in duly and the lowest temperature coincides with thewinter rains of January, since there is no rain in tlic sunnnor monthson the Red Sea coast. At Assal) conditions similar to those of Massaua prevail, hut tlioobservations there not form so long or so


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