126 
MR. HORNER ON THE ALLUVIAL LAND OF EGYPT. 
lizing’ properties, and brought to improve the gardens near Alexandria. It is a 
fine-grained blackish-grey, loosely coherent earth. It was analysed by Mr. Johnson 
at the Royal College of Chemistry, under the superintendence of Dr. Hofmann, and 
yielded the following results : — 
Silica 56-86 
Sesquioxide of iron 13-19 
Alumina 12-11 
Carbonate of lime 3-12 
Sulphate of lime 0-38 
Lime 3-53 
Magnesia 2-73 
Potassa 0-90 
Soda 0-89 
Chloride of potassium 0-57 
Organic matter 5-53 
Loss 0-19 
100-00 
On the application of Mr. Murray, Mougel Bey, the French Engineer of the Bar- 
rage of the Nile, was so obliging as to send me ten specimens of the soils penetrated 
at different depths in sinking the foundations. These were analysed at the Royal 
College of Chemistry by Mr. Brazier, and gave the following results: — 
C. — A greenish grey, smooth, fine-grained earth, which when moistened kneads 
into a somewhat gritty clay. The exact locality was not given, but Mougel Bey 
describes it thus : “ Dans les couches d’argile on trouve des nids de limon ferrugineux 
que les Fellahs emploient comme amendement sur les terres.” 
Silica 49-77 
Sesquioxide of iron 22-25 
Sesquioxide of alumina 5-49 
Alumina 7-38 
Carbonate of lime 3-37 
Lime 1-53 
Magnesia 0-14 
Potassa 0-77 
Soda 0-37 
Sulphuric acid 0-15 
Phosphoric acid traces 
Organic matter 8-78 
100-00 
D. — A blackish browm earth, very much resembling A. except in colour. Like 
it, when moistened, it kneads into a clay. From the apex of the Delta, on the 
right bank of the Damietta branch, and from a depth of nearly 20 feet from the 
surface. 
