﻿144 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  

  Evaporation 
  at 
  Rochester. 
  Tables 
  Nos. 
  30 
  and 
  31 
  give 
  evapora- 
  

   tion 
  at 
  Kochester 
  1 
  for 
  the 
  indicated 
  months 
  of 
  the 
  years 
  1892-1903, 
  

   inclusive. 
  The 
  data 
  of 
  table 
  No. 
  30 
  have 
  been 
  obtained 
  by 
  ob- 
  

   serving 
  the 
  changes 
  in 
  elevation 
  of 
  the 
  water 
  surface 
  in 
  a 
  tub 
  

   floating 
  on 
  the 
  surface 
  of 
  Mount 
  Hope 
  reservoir 
  of 
  the 
  Kochester 
  

   waterworks, 
  and 
  may 
  be 
  taken 
  as 
  representing 
  the 
  approximate 
  

   evaporation 
  from 
  a 
  free 
  water 
  surface 
  in 
  western 
  New 
  York. 
  

  

  Table 
  No. 
  31 
  gives 
  evaporation 
  from 
  a 
  water 
  surface 
  in 
  an 
  ex- 
  

   posed 
  tub 
  on 
  land 
  for 
  the 
  same 
  years 
  and 
  months 
  as 
  are 
  included 
  

   in 
  table 
  No. 
  30. 
  

  

  Observations 
  of 
  evaporation 
  from 
  water 
  surfaces 
  for 
  a 
  month 
  

   or 
  two 
  have 
  been 
  reported 
  from 
  one 
  or 
  two 
  other 
  places, 
  but 
  so 
  far 
  

   as 
  results 
  of 
  any 
  value 
  in 
  actual 
  work 
  are 
  concerned, 
  the 
  forego- 
  

   ing 
  include 
  everything 
  thus 
  far 
  determined 
  in 
  this 
  State. 
  

  

  Drain 
  gages 
  at 
  Geneva. 
  In 
  1882 
  the 
  Agricultural 
  Experiment 
  

   Station 
  at 
  Geneva 
  constructed 
  three 
  drain 
  gages 
  or 
  lysimeters 
  for 
  

   the 
  purpose 
  of 
  collecting 
  and 
  measuring 
  drainage 
  and 
  evapora- 
  

   tion 
  from 
  the 
  soil. 
  These 
  gages 
  are 
  described 
  in 
  the 
  annual 
  report 
  

   of 
  the 
  Agricultural 
  Experiment 
  Station 
  for 
  the 
  year 
  1882, 
  as 
  

   follows 
  : 
  

  

  Box 
  frames 
  a 
  little 
  over 
  twenty-five 
  inches 
  square 
  and 
  three 
  

   deep, 
  internal 
  diameter, 
  were 
  made 
  of 
  oak 
  plank, 
  strongly 
  ironed 
  

   at 
  the 
  corners. 
  These 
  boxes 
  were 
  lined 
  with 
  heavy 
  copper 
  fas- 
  

   tened 
  to 
  the 
  boxes 
  at 
  intervals 
  by 
  means 
  of 
  heavy 
  copper 
  tacks, 
  

   and 
  the 
  projection 
  of 
  the 
  copper 
  at 
  the 
  top 
  and 
  bottom 
  bent 
  over 
  

   the 
  wood 
  and 
  securely 
  tacked, 
  the 
  area 
  measuring 
  after 
  the 
  cop- 
  

   per 
  was 
  in 
  place 
  25.04 
  inches 
  square, 
  or 
  one 
  ten-thousandth 
  of 
  an 
  

   acre. 
  The 
  copper 
  was 
  strongly 
  soldered 
  at 
  the 
  joinings, 
  and 
  the 
  

   tack 
  heads 
  securely 
  soldered 
  into 
  place 
  after 
  being 
  slightly 
  coun- 
  

   tersunk. 
  May 
  29 
  these 
  frames, 
  three 
  in 
  number, 
  were 
  fitted 
  with 
  

   a 
  temporary 
  cutting 
  edge 
  of 
  angle 
  iron 
  screwed 
  to 
  the 
  lower 
  sur- 
  

   face, 
  the 
  cutting 
  edge 
  being 
  parallel 
  with 
  the 
  inside 
  face 
  of 
  the 
  

   box, 
  and 
  the 
  bevel 
  toward 
  the 
  outside 
  and 
  placed 
  over 
  the 
  sod. 
  

   By 
  means 
  of 
  a 
  heavy 
  weight 
  placed 
  on 
  top, 
  aided 
  by 
  heavy 
  mauls 
  

   with 
  which 
  blows 
  were 
  struck 
  upon 
  each 
  of 
  two 
  opposite 
  corners 
  

   consecutively, 
  a 
  ditch 
  being 
  dug 
  along 
  the 
  outside 
  as 
  the 
  box 
  en- 
  

   tered 
  the 
  soil, 
  these 
  frames 
  were 
  forced 
  their 
  whole 
  depth 
  into 
  the 
  

   soil. 
  A 
  heavy 
  flat 
  section 
  of 
  boiler 
  iron, 
  the 
  edge 
  sharpened, 
  was 
  

  

  Annual 
  Report 
  of 
  Executive 
  Board 
  and 
  of 
  the 
  City 
  Engineer 
  of 
  Rochester. 
  

  

  