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V.  An  Account  of  some  recent  Researches  near  Cairo,  undertaken  with  the  view  of 
throiving  light  upon  the  Geological  History  of  the  Alluvial  Land  of  Egypt. — 
Instituted  hy  Leonaed  Hoenee,  Esg.,  Vice-President  of  the  Royal  Society,  Fellow  of 
the  Royal  Society  of  Edinburgh,  and  Vice-President  of  the  Geological  Society. 
PAET  II. 
Eeceived  January  25, — Eead  Eebruary  11,  1858. 
Contents  : — 
Introduction, 
iN’ature  of  the  Alluvial  Soils  
The  recent  Eesearches  in  the  Memphis  district  
. Inequalities  in  the  surface  of  the  ground 
The  excavations,  shafts  and  borings  at  the  Colossal  Statue  
Section  of  the  first  shaft  and  deepest  boring  at  the  Statue 
Section  of  the  second  shaft  and  boring  at  the  Statue  
Pits  sunk  in  the  vicinity  of  the  Statue 
Pits  across  the  valley  in  the  parallel  of  Memphis  
Pits  across  the  valley  in  the  parallel  of  HeliopoHs 
Eeview  of  the  chief  facts  made  known  by  the  excavations,  &c 
Circumstances  which  modify  the  deposition  of  the  sediment  in  different  parts  of  the  valley  
The  underground  filtration  water  
The  rate  of  secular  increase  of  the  alluvial  land  
How  far  a local  secular  rate  of  increase  of  the  alluvial  land  may,  with  probability,  be  estimated 
from  these  recent  researches  
Evidence  which  these  researches  would  seem  to  afford  of  a very  early  existenfie  of  Man  in  Egypt . . 
Ap'pendix. 
jS'ote  A.  Biographical  sketch  of  Hekektan  Bet  78 
Note  B.  Microscopic  organisms  in  the  Nile  sediment  79 
Note  C.  Gieaed’s  estimate  of  the  secular  increase  of  theJand  80 
Note  D.  Excavations  by  the  Erench  Engineers  in  1799 84 
Note  E.  Bunsen  on  the  early  existence  of  Man  in  Egypt 86 
At  the  conclusion  of  the  first  part  of  this  memoir  I stated  that,  besides  the  operations 
at  Heliopolis  therein  described,  researches  on  a more  extensive  scale  had  subsequently 
been  undertaken  in  the  district  of  ancient  Memphis  and  in  the  valley  on  the  western 
* Philosophical  Transactions,  1855,  Part  I.  p.  105.  It  may  be  useful  for  the  reader  to  refer  to  the  Intro- 
duction in  Part  I.,  where  I describe  the  geological  object  of  these  researches,  and  the  means  by  which  I 
hoped  that  it  might  be  accomplished. 
MDCCCLVIII.  I 
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