MR. HORNER ON THE ALLUVIAL LAND OF EGYPT. 
127 
Silica 54*99 
Sesquioxide of iron 21*04 
Sesquioxide of alumina 11*14 
Carbonate of lime 4*20 
Lime 3*08 
Magnesia 0*17 
Potassa 0*69 
Soda 0*46 
Sulphuric acid 0*12 
Phosphoric acid trace 
Chlorine trace 
Organic matter 4*11 
100*00 
E, — A blackish brown earth, imdistingaishable in external characters from D. 
From the left bank of the Rosetta branch, and behind the dyke, at a depth of about ‘ 
20 feet from the surface. 
Silica 55*66 
Sesquioxide of iron 15*94 
Sesquioxide of alumina 4*60 
Alumina 5*80 
Carbonate of lime 5*26 
Lime 3*42 
Magnesia 1*03 
Potassa 0*74 
Soda 0*55 
Sulphuric acid 0*33 
Phosphoric acid traces 
Chlorine traces 
Organic matter 6*67 
100*00 
F. — A blackish brown earth, similar to D. and E. in external characters, but 
indurated: when reduced to powder, not distinguishable from them, but when 
moistened it kneads into a more plastic clay than they do. From the same locality 
as D, but at a depth of only 5 feet 3 inches. 
Silica 52*76 
Sesquioxide of iron 24*94 
Sesquioxide of alumina 13*84 
Carbonate of lime 2*95 
Sulphate of lime 0*83 
Lime 0*94 
Magnesia trace 
Alkalies trace 
Chlorine trace 
Organic matter 3*74 
100*00 
