﻿HYDROLOGY 
  OF 
  NEW 
  YORK 
  

  

  161 
  

  

  we 
  have 
  given 
  the 
  distance 
  from 
  the 
  curb 
  to 
  the 
  water 
  surface 
  on 
  

   the 
  first 
  day 
  of 
  December, 
  1886, 
  and 
  on 
  the 
  first 
  day 
  of 
  each 
  month 
  

   thereafter, 
  and 
  also 
  the 
  rainfall 
  of 
  the 
  preceding 
  month. 
  

   1886. 
  iaS7. 
  1888. 
  i88S. 
  

  

  5<o 
  

  

  ?r^ryr-jc^ 
  _i 
  

  

  

  (Scale 
  for 
  night 
  of 
  ground 
  water 
  in 
  feet 
  and 
  for 
  rainfall 
  in 
  inches 
  ) 
  

  

  Fig. 
  4 
  Diagram 
  showing 
  the 
  relation 
  between 
  rainfall 
  and 
  hight 
  of 
  ground 
  

   water 
  at 
  the 
  Geneva 
  Agricultural 
  Experiment 
  Station, 
  from 
  December 
  1, 
  

   1886, 
  to 
  December 
  1, 
  1889. 
  

  

  In 
  the 
  cut, 
  figure 
  No. 
  4, 
  the 
  figures 
  in 
  table 
  No. 
  36, 
  have 
  been 
  

   platted, 
  showing 
  graphically 
  the 
  relation 
  between 
  rainfall 
  and 
  

   hight 
  of 
  ground 
  water 
  for 
  the 
  three 
  years 
  from 
  December 
  1, 
  1886, 
  

   to 
  December 
  1, 
  1889, 
  inclusive. 
  In 
  discussing 
  these 
  records, 
  the 
  

   Acting 
  Meteorologist 
  of 
  the 
  Agricultural 
  Experiment 
  Station 
  

   notes 
  the 
  following 
  facts 
  : 
  

  

  1) 
  Fluctuations 
  in 
  the 
  precipitation 
  from 
  month 
  to 
  month 
  did 
  

   not 
  much 
  affect 
  the 
  hight 
  of 
  the 
  water-table. 
  The 
  very 
  light 
  pre- 
  

   cipitation 
  of 
  January, 
  1887, 
  did 
  not 
  stop 
  the 
  rise 
  of 
  the 
  water- 
  

   table, 
  nor 
  did 
  the 
  extremely 
  large 
  rainfall 
  of 
  July 
  of 
  the 
  same 
  year 
  

   cause 
  the 
  water-table 
  to 
  stop 
  falling. 
  

  

  2) 
  The 
  rapid 
  rise 
  in 
  the 
  water-table 
  from 
  January 
  7 
  to 
  April 
  

   1, 
  1888, 
  or 
  from 
  December 
  1, 
  1888, 
  to 
  January 
  1, 
  1889, 
  was 
  not 
  

   due 
  to 
  large 
  precipitation 
  during 
  this 
  time, 
  nor 
  was 
  the 
  fall 
  from 
  

   May 
  7 
  to 
  November 
  1, 
  1888, 
  due 
  to 
  small 
  precipitation. 
  

  

  3) 
  The 
  rapid 
  rise 
  of 
  water 
  from 
  November 
  18 
  to 
  December 
  1, 
  

   1889, 
  was 
  in 
  part 
  at 
  least 
  due 
  to 
  the 
  heavy 
  rainfall 
  of 
  the 
  18th 
  to 
  

   23d, 
  which 
  found 
  the 
  soil 
  nearly 
  or 
  quite 
  saturated. 
  The 
  rainfall 
  

   for 
  that 
  time 
  was 
  2.60 
  inches, 
  followed 
  by 
  0.51 
  inch 
  more 
  during 
  

   the 
  latter 
  days 
  of 
  November, 
  

  

  