ME.  HOENEE  ON  THE  ALLUVIAL  LAND  OF  EOTPT. 
65 
yards  above  the  intersection  of  the  parallel  of  Heliopolis  with  the  great  Arabian  dyke  of 
the  Nile,  the  surface  of  the  ground  beiag  2 feet  5 inches  below  the  inundation  level  of 
1853.  The  boring  was  made  from  the  14th  to  the  17th  of  October,  and  from  the  2nd 
to  the  11th  of  November  1854,  was  carried  down  to  the  depth  of  59  feet  10  inches, 
and  yielded  the  folloMung  remarkable  results : — 
ft.  in. 
20  0 of  ordinary  Nile  sediment. 
8 4 of  grey  quartzose  sand. 
5 0 of  Nile  sediment. 
2 0 of  sand. 
1 0 of  Nile  sediment. 
11  0 of  sands. 
1 0 of  Nile  sediment. 
11  6 of  sands. 
59  10 
Out  of  thirty-seven  times  that  the  boring  tool  was  brought  up,  in  twenty-one  instances 
the  soil  contained  particles  of  “ rubbish,”  even  at  the  lowest  depths.  Of  the  sixteen 
instances  in  which  the  “ rubbish  ” was  not  found,  the  soil  consisted  of  sand. 
This  bormg  had  reached  to  within  7 feet  4^  inches  of  the  mean  level  of  the  Mediter- 
ranean : — 
ft.  in. 
Level  of  the  inundation  water  at  Bedreshin,  above  the  mean  le"' 
Mediterranean 
Deduct : — 1.  Fall  from  Bedreshin  to  the  island  of  Rhoda  . . 
FaU  fr'om  Rhoda  to  the  parallel  of  Heliopolis, 
10  miles,  at  the  rate  of  3f  inches  in  a mile 
(Memoir,  Part  1.  p.  114) 
Surface  of  ground  at  the  mouth  of  the  boring  below 
the  inundation  level  . . . ' 
Surface  of  the  ground  at  the  boring 67  2^ 
Depth  of  the  boring 5910 
In  this  boring,  the  samples  of  soil  down  to  the  end  of  the  53rd  foot  from  the  surface 
of  the  ground,  were  extracted  by  turning  the  screw  in  the  soil  exactly  a foot  deep  each 
time.  The  remainder  of  the  depth  was  jumped  through,  and  the  samples  brought  up 
were  estimated  from  the  contents  of  the  bottom  tube  in  the  screw. 
rel  01  me] 
78  3 
ft.  in. 
5 6 
3 IL 
2 5 
11  OL 
