﻿HYDROLOGY 
  OP 
  NEW 
  YORK 
  183 
  

  

  year 
  was 
  34.66 
  inches, 
  while 
  in 
  1844, 
  we 
  have 
  for 
  the 
  storage 
  

   period, 
  10.52 
  inches, 
  and 
  the 
  total 
  for 
  the 
  year 
  of 
  26.46 
  inches. 
  At 
  

   Micldlebury 
  Academy, 
  for 
  the 
  storage 
  period 
  of 
  1845, 
  the 
  rainfall 
  

   was 
  12.59 
  inches; 
  for 
  the 
  growing 
  period, 
  4.82 
  inches; 
  for 
  the 
  

   replenishing 
  period, 
  8.6 
  inches, 
  and 
  the 
  total 
  for 
  the 
  year 
  was 
  

   26.01 
  inches. 
  The 
  record 
  for 
  the 
  year 
  1846 
  at 
  Middlebury 
  Acad- 
  

   emy 
  is 
  not 
  given, 
  but 
  it 
  is 
  clear, 
  so 
  far 
  as 
  we 
  have 
  any 
  definite 
  

   meteorological 
  record, 
  that 
  the 
  gagings 
  made 
  by 
  Mr 
  Marsh 
  were 
  

   at 
  a 
  time 
  of 
  very 
  low 
  water. 
  

  

  Gagings 
  made 
  in 
  1895 
  show 
  that 
  in 
  the 
  month 
  of 
  July 
  the 
  flow 
  

   at 
  Rochester 
  may 
  have 
  been 
  as 
  low 
  as 
  232 
  cubic 
  feet 
  per 
  second, 
  

   and 
  in 
  September, 
  221 
  cubic 
  feet 
  per 
  second. 
  These 
  results 
  are 
  

   derived 
  from 
  actual 
  gagings 
  at 
  Mount 
  Morris 
  by 
  comparison 
  of 
  

   catchment 
  areas. 
  Taking 
  approximate 
  gagings 
  made 
  at 
  Rochester, 
  

   at 
  the 
  Johnson 
  and 
  Seymour 
  dam, 
  for 
  the 
  same 
  year, 
  we 
  have 
  220 
  

   cubic 
  feet 
  per 
  second 
  for 
  the 
  mean 
  of 
  the 
  month 
  of 
  October. 
  

   Moreover, 
  gagings 
  made 
  at 
  the 
  raceway 
  of 
  the 
  Genesee 
  Paper 
  

   Company 
  during 
  the 
  summer 
  of 
  1895 
  indicate 
  that 
  on 
  several 
  

   occasions 
  the 
  flow 
  was 
  less 
  than 
  200 
  cubic 
  feet 
  per 
  second. 
  The 
  

   canal, 
  however, 
  was 
  low 
  during 
  these 
  years 
  and 
  was 
  drawing 
  

   some 
  water 
  through 
  the 
  feeder 
  at 
  Rochester 
  — 
  probably, 
  on 
  an 
  

   average, 
  about 
  50 
  cubic 
  feet 
  per 
  second. 
  We 
  have, 
  then, 
  a 
  total 
  

   low-water 
  Aoav 
  at 
  Rochester 
  of 
  about 
  250 
  cubic 
  feet 
  per 
  second 
  

   during 
  the 
  period 
  July-October, 
  1895. 
  This 
  quantity 
  is 
  162 
  cubic 
  

   feet 
  per 
  second 
  less 
  than 
  the 
  low-water 
  flow 
  of 
  1846, 
  as 
  deter- 
  

   mined 
  by 
  Mr 
  Marsh. 
  

  

  The 
  catchment 
  area 
  of 
  the 
  Genesee 
  river 
  at 
  Mount 
  Morris, 
  

   where 
  the 
  gagings 
  were 
  made, 
  is 
  1070 
  square 
  miles, 
  and 
  at 
  Roch- 
  

   ester, 
  with 
  deductions 
  for 
  the 
  area 
  at 
  Hemlock 
  lake, 
  used 
  as 
  a 
  

   water 
  supply 
  for 
  Rochester, 
  etc. 
  2365 
  square 
  miles. 
  In 
  1846 
  the 
  

   upper 
  Genesee 
  area 
  was 
  still 
  largely 
  in 
  forest 
  — 
  probably 
  for 
  the 
  

   entire 
  area 
  above 
  Rochester 
  the 
  primeval 
  forest 
  was 
  from 
  50 
  per 
  

   cent 
  to 
  60 
  per 
  cent 
  of 
  the 
  Avhole.' 
  1 
  We 
  have 
  here, 
  therefore, 
  a 
  

  

  i 
  In 
  Allegany 
  county, 
  according 
  to 
  the 
  State 
  census 
  of 
  1855, 
  the 
  unim- 
  

   proved 
  area 
  was 
  GO 
  per 
  cent 
  of 
  the 
  whole, 
  but 
  in 
  Livingston 
  and 
  Monroe 
  

   counties 
  it 
  was 
  considerably 
  less. 
  Since 
  the 
  rapid 
  removal 
  of 
  the 
  timber 
  

   did 
  not 
  begin 
  until 
  after 
  the 
  construction 
  of 
  the 
  Erie 
  railroad, 
  it 
  is 
  con- 
  

   sidered 
  that 
  in 
  184G, 
  50 
  per 
  cent 
  to 
  GO 
  per 
  cent 
  is 
  not 
  far 
  from 
  right. 
  

  

  