﻿EXPERIMENTS 
  AT 
  CLIFTONDALE, 
  MASS. 
  19 
  

  

  ration 
  tower 
  at 
  Mount 
  Gilead 
  in 
  the 
  Lynn 
  Woods. 
  (PL 
  VII.) 
  

   The 
  arms 
  on 
  these 
  screens 
  were 
  10 
  feet 
  long 
  and 
  4 
  feet 
  high. 
  The 
  

   trap 
  was 
  placed 
  at 
  the 
  top 
  of 
  a 
  tower 
  50 
  feet 
  from 
  the 
  ground 
  and 
  

   fully 
  % 
  2iS 
  feet 
  above 
  the 
  tops 
  of 
  the 
  tallest 
  trees. 
  A 
  few 
  caterpillars 
  

   were 
  feeding 
  on 
  April 
  29, 
  the 
  date 
  when 
  the 
  trap 
  was 
  installed. 
  

  

  The 
  object 
  of 
  this 
  experiment 
  was 
  to 
  determine, 
  if 
  possible, 
  

   whether 
  caterpillars 
  could 
  be 
  caught 
  high 
  in 
  the 
  air. 
  The 
  woodland 
  

   surrounding 
  this 
  tower 
  was 
  badly 
  infested, 
  and 
  later 
  in 
  the 
  season 
  

   a 
  considerable 
  area 
  was 
  completely 
  stripped 
  of 
  foliage. 
  On 
  May 
  4 
  

   the 
  trap 
  was 
  examined, 
  but 
  no 
  caterpillars 
  could 
  be 
  found. 
  A 
  large 
  

   percentage 
  of 
  the 
  gipsy-moth 
  caterpillars 
  had 
  hatched, 
  but 
  most 
  of 
  

   the 
  larva 
  1 
  were 
  still 
  on 
  the 
  egg 
  clusters, 
  although 
  some 
  were 
  feeding. 
  

   The 
  weather 
  was 
  cool, 
  and 
  only 
  a 
  slight 
  wind 
  was 
  blowing. 
  

  

  The 
  trap 
  was 
  examined 
  on 
  May 
  7, 
  11, 
  16, 
  and 
  17, 
  but 
  no 
  caterpil- 
  

   lars 
  could 
  be 
  found. 
  On 
  May 
  28 
  another 
  examination 
  was 
  made 
  

   with 
  the 
  same 
  result. 
  In 
  woodland 
  the 
  caterpillars 
  were 
  now 
  in 
  the 
  

   second, 
  third, 
  and 
  a 
  few 
  in 
  the 
  fourth 
  stage. 
  The 
  weather 
  was 
  cool, 
  

   and 
  very 
  few 
  were 
  spinning 
  down 
  from 
  the 
  trees. 
  On 
  June 
  7 
  another 
  

   examination 
  was 
  made, 
  and 
  on 
  the 
  13th 
  the 
  screen 
  was 
  moved 
  and 
  

   brought 
  to 
  the 
  laboratory, 
  where 
  it 
  was 
  examined 
  later 
  in 
  the 
  season 
  

   by 
  Messrs. 
  Proctor 
  and 
  Schaffner, 
  but 
  no 
  gipsy-moth 
  caterpillars 
  

   were 
  found. 
  

  

  EXPERIMENTS 
  AT 
  CLIFTONDALE, 
  MASS. 
  

  

  Another 
  experiment 
  was 
  conducted 
  near 
  Cliftondale, 
  Mass. 
  Per- 
  

   mission 
  was 
  secured 
  to 
  drop 
  wire 
  screens, 
  which 
  had 
  been 
  tangle- 
  

   footed, 
  from 
  the 
  sides 
  of 
  a 
  high 
  water 
  tower 
  (PL 
  VIII) 
  at 
  the 
  old 
  

   Saugus 
  race 
  track, 
  which 
  borders 
  a 
  large 
  area 
  of 
  salt 
  marshes. 
  These 
  

   screens 
  were 
  manipulated 
  with 
  ropes 
  and 
  pulleys 
  in 
  such 
  a 
  way 
  

   that 
  they 
  could 
  be 
  raised 
  and 
  lowered 
  in 
  order 
  to 
  make 
  examinations. 
  

   On 
  one 
  side 
  of 
  the 
  tower, 
  to 
  the 
  eastward, 
  no 
  trees 
  were 
  growing 
  

   for 
  a 
  distance 
  of 
  about 
  2 
  miles, 
  and 
  the 
  nearest 
  trees 
  in 
  any 
  direc- 
  

   tion, 
  except 
  for 
  a 
  few 
  willow 
  sprouts 
  growing 
  along 
  the 
  edge 
  of 
  the 
  

   race 
  track 
  which 
  will 
  be 
  mentioned 
  later, 
  were 
  a 
  quarter 
  of 
  a 
  mile 
  

   distant. 
  

  

  Two 
  screens, 
  34 
  feet 
  long 
  and 
  6 
  feet 
  wide, 
  were 
  dropped 
  from 
  the 
  

   cast 
  side 
  of 
  the 
  tower, 
  while 
  another 
  screen 
  of 
  the 
  same 
  dimensions 
  

   was 
  suspended 
  on 
  the 
  west 
  side. 
  They 
  were 
  placed 
  in 
  position 
  April 
  

   80, 
  1910, 
  and 
  were 
  examined 
  at 
  intervals 
  until 
  the 
  middle 
  of 
  June. 
  

   On 
  May 
  11, 
  a 
  single 
  gipsy-moth 
  caterpillar 
  was 
  found 
  on 
  one 
  of 
  the 
  

   screens 
  on 
  the 
  east 
  side 
  of 
  the 
  tower, 
  -25 
  feet 
  from 
  the 
  ground. 
  On 
  

   May 
  IS 
  a 
  stock 
  of 
  newly 
  hatched 
  gipsy-moth 
  caterpillars 
  was 
  lib- 
  

   erated 
  in 
  the 
  marsh 
  1,600 
  feel 
  south 
  of 
  (he 
  tower 
  at 
  several 
  stations, 
  

   the 
  idea 
  being 
  to 
  give 
  an 
  opportunity 
  for 
  the 
  larva' 
  to 
  he 
  carried 
  

   by 
  the 
  wind 
  to 
  the 
  tanglefoot 
  screens. 
  No 
  caterpillars 
  were 
  found 
  

  

  