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  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Details 
  Concerning 
  Tables 
  and 
  Diagrams 
  

  

  Topographic 
  relations 
  of 
  catchment 
  areas 
  of 
  some 
  of 
  the 
  main 
  

   streams 
  tabulated. 
  The 
  following 
  gives 
  an 
  outline 
  of 
  the 
  topog- 
  

   raphy 
  of 
  Muskingum, 
  Genesee, 
  Croton) 
  and 
  Hudson 
  rivers. 
  

  

  The 
  headwaters 
  of 
  Muskingum 
  river 
  lie 
  at 
  an 
  elevation 
  of 
  about 
  

   1100 
  feet, 
  and 
  it 
  flows 
  into 
  the 
  Ohio 
  river, 
  near 
  Marietta, 
  at 
  an 
  

   elevation 
  of 
  about 
  500 
  feet. 
  The 
  Muskingum 
  river 
  proper 
  has 
  a 
  

   length 
  of 
  109 
  miles, 
  with 
  its 
  main 
  tributaries, 
  the 
  Walhonding 
  and 
  

   the 
  Tuscarawas, 
  having 
  an 
  additional 
  length 
  of 
  about 
  100 
  miles, 
  

   thus 
  giving 
  the 
  basin 
  a 
  length 
  of 
  200 
  miles. 
  From 
  the 
  head 
  of 
  the 
  

   Tuscarawas 
  to 
  the 
  junction 
  of 
  the 
  two 
  main 
  tributaries 
  there 
  i» 
  

   a 
  fall 
  of 
  about 
  2 
  feet 
  per 
  mile, 
  and 
  from 
  this 
  point 
  to 
  the 
  mouth 
  

   of 
  the 
  main 
  Muskingum 
  the 
  descent 
  is 
  about 
  1.5 
  feet 
  per 
  mile. 
  On 
  

   the 
  Walhonding 
  the 
  descent 
  is 
  more 
  rapid. 
  At 
  its 
  headwaters, 
  

   near 
  Mansfield, 
  the 
  stream 
  is 
  from 
  400 
  to 
  450 
  feet 
  above 
  what 
  it 
  

   is 
  at 
  its 
  junction 
  with 
  the 
  Tuscarawas. 
  

  

  The 
  Genesee 
  river 
  rises 
  in 
  Potter 
  county, 
  Pa., 
  and 
  flows 
  in 
  a 
  

   northerly 
  direction 
  across 
  the 
  State 
  of 
  New 
  York, 
  emptying 
  into 
  

   Lake 
  Ontario 
  at 
  Rochester^ 
  having 
  a 
  total 
  length 
  of 
  about 
  115 
  

   miles.' 
  Its 
  headwaters 
  are 
  at 
  an 
  elevation 
  of 
  over 
  2000 
  feet, 
  while 
  

   Lake 
  Ontario 
  lies 
  at 
  a 
  mean 
  elevation 
  of 
  247 
  feet. 
  This 
  stream 
  i» 
  

   specially 
  characterized 
  by 
  two 
  sets 
  of 
  falls. 
  The 
  three 
  falls 
  at 
  

   Portage 
  have 
  an 
  aggregate 
  of 
  about 
  270 
  feet, 
  while 
  at 
  Rochester 
  

   the 
  river 
  falls 
  263 
  feet, 
  also 
  in 
  three 
  falls, 
  with 
  some 
  intervening 
  

   rapids. 
  This 
  stream 
  flows 
  for 
  several 
  miles, 
  at 
  Rochester 
  and 
  

   Portage, 
  over 
  bare 
  rocks. 
  

  

  The 
  Croton 
  river 
  flows 
  into 
  the 
  Hudson 
  at 
  Croton 
  Landing 
  at 
  an 
  

   elevation 
  of 
  practically 
  tidewater. 
  Its 
  extreme 
  headwaters 
  in 
  

   Dutchess 
  county 
  are 
  at 
  an 
  elevation 
  of 
  about 
  700 
  feet 
  above 
  tide. 
  

   Its 
  length 
  is 
  about 
  35 
  miles. 
  

  

  Hudson 
  river, 
  at 
  Mechanicville, 
  is 
  about 
  60 
  feet 
  above 
  tide, 
  while 
  

   at 
  its 
  extreme 
  headwaters 
  it 
  is 
  about 
  3400 
  feet 
  above 
  tide 
  level. 
  

   The 
  catchment 
  area 
  above 
  Glens 
  Falls 
  is 
  from 
  40 
  to 
  50 
  miles 
  from 
  

   east 
  to 
  west 
  and 
  from 
  60 
  to 
  65 
  miles 
  from 
  north 
  to 
  south. 
  Below 
  

   Glens 
  Falls 
  the 
  catchment 
  extends 
  well 
  into 
  southern 
  Vermont 
  

   and 
  Massachusetts. 
  The 
  length 
  of 
  the 
  stream 
  above 
  Mechanic- 
  

   ville 
  is 
  from 
  120 
  to 
  125 
  miles. 
  

  

  

  