﻿156 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  1888 
  — 
  Inches 
  

  

  Storage 
  3.50 
  

  

  Growing 
  1.15 
  

  

  Replenishing 
  1 
  . 
  00 
  

  

  Yearly 
  total 
  5.65 
  

  

  1889— 
  

  

  Storage 
  3.10 
  

  

  Growing 
  3 
  . 
  95 
  

  

  Replenishing 
  1 
  .05 
  

  

  Yearly 
  total.. 
  ^ 
  8.10 
  

  

  Mean 
  5.63 
  

  

  Comparing 
  the 
  foregoing 
  mean 
  of 
  5.63 
  inches 
  with 
  the 
  mean 
  of 
  

   runoff 
  from 
  sod, 
  bare 
  soil 
  and 
  cultivated 
  soil, 
  as 
  per 
  table 
  No. 
  33, 
  

   we 
  see 
  that 
  the 
  mean 
  of 
  all 
  is 
  7.91 
  inches. 
  If, 
  however, 
  we 
  omit 
  

   the 
  years 
  1886 
  and 
  1889, 
  which 
  appear 
  to 
  be 
  abnormally 
  high, 
  we 
  

   find 
  that 
  the 
  mean 
  of 
  all 
  is 
  5.77 
  inches, 
  which 
  compares 
  very 
  

   closely 
  with 
  the 
  mean 
  found 
  by 
  the 
  computation. 
  Undoubtedly 
  

   there 
  is 
  some 
  inaccuracy 
  in 
  the 
  record 
  of 
  the 
  drain 
  gages, 
  as 
  well 
  

   as 
  in 
  the 
  record 
  of 
  the 
  precipitation, 
  and 
  the 
  foregoing 
  computa- 
  

   tion 
  is 
  given 
  chiefly 
  to 
  show 
  that 
  with 
  good 
  data 
  the 
  computa- 
  

   tion 
  of 
  runoff 
  from 
  a 
  rainfall 
  record 
  can 
  be 
  made 
  with 
  consider- 
  

   able 
  precision. 
  

  

  In 
  the 
  Sixth 
  Annual 
  Report 
  of 
  the 
  Geneva 
  Agricultural 
  Experi- 
  

   ment 
  Station 
  (1887) 
  it 
  is 
  stated 
  that 
  discussion 
  of 
  the 
  results 
  

   from 
  these 
  drain 
  gages 
  has 
  been 
  deferred, 
  hoping 
  that 
  sufficient 
  

   data 
  would 
  reconcile 
  the 
  discrepancies 
  existing 
  between 
  the 
  drain 
  

   gage 
  results 
  and 
  what 
  apparently 
  takes 
  place 
  in 
  outside 
  soils. 
  1 
  In 
  

   regard 
  to 
  the 
  discrepancies, 
  the 
  foregoing 
  discussion 
  as 
  to 
  over- 
  

   sight 
  in 
  precipitation 
  records 
  largely 
  explains 
  them 
  and 
  probably 
  

   further 
  discussion 
  is 
  unnecessary. 
  

  

  Nevertheless, 
  it 
  should 
  be 
  stated 
  that 
  in 
  an 
  ordinary 
  drain 
  gage, 
  

   since 
  the 
  soil 
  within 
  the 
  gage 
  is 
  not 
  in 
  connection 
  with 
  a 
  perma- 
  

   nent 
  water 
  table, 
  the 
  acquisition 
  of 
  water 
  by 
  capillarity 
  from 
  

  

  1 
  Report 
  of 
  Agricultural 
  Experiment 
  Station 
  at 
  Geneva 
  for 
  1887, 
  p. 
  389. 
  

  

  