﻿— 
  35 
  — 
  

  

  as 
  far 
  as 
  the 
  scales 
  extended, 
  and 
  upward 
  not 
  at 
  all. 
  From 
  another 
  

   piece 
  on 
  the 
  same 
  tree 
  the 
  fungus 
  had 
  spread 
  upward 
  a 
  foot 
  and 
  a 
  half, 
  

   downward 
  two 
  and 
  a 
  half 
  feet, 
  and 
  thence 
  an 
  equal 
  distance 
  on 
  a 
  lateral 
  

   branch. 
  From 
  still 
  a 
  third 
  piece 
  it 
  had 
  spread 
  downward 
  three 
  and 
  a 
  

   half 
  feet 
  and 
  out 
  si.x 
  inches 
  on 
  a 
  branching 
  twig. 
  Another 
  tree 
  five 
  

   inches 
  in 
  diameter, 
  to 
  which 
  six 
  pieces 
  of 
  bark 
  had 
  been 
  tied, 
  was 
  so 
  

   generally 
  covered 
  with 
  the 
  fungus 
  infesting 
  the 
  scales 
  that 
  it 
  was 
  difficult 
  

   to 
  say 
  whence 
  and 
  how 
  far 
  it 
  had 
  spread. 
  Excepting 
  the 
  smaller 
  and 
  

   upper 
  twigs 
  and 
  branches, 
  the 
  entire 
  tree 
  was 
  infected. 
  In 
  some 
  places 
  

   on 
  this 
  tree 
  the 
  lateral 
  spread 
  must 
  have 
  been 
  at 
  least 
  six 
  feet. 
  Another 
  

   tree 
  in 
  this 
  same 
  orchard, 
  to 
  which 
  five 
  twigs 
  had 
  been 
  attached, 
  showed 
  

   the 
  scale 
  fungus 
  distributed 
  upward 
  from 
  points 
  of 
  infection 
  to 
  distances 
  

   varying 
  from 
  six 
  inches 
  to 
  a 
  foot, 
  downward 
  from 
  sixteen 
  inches 
  to 
  

   three 
  feet, 
  and 
  laterally 
  from 
  six 
  to 
  twenty-six 
  inches. 
  

  

  The 
  results 
  of 
  infection 
  by 
  means 
  of 
  artificial 
  cultures 
  were 
  equally 
  

   favorable, 
  and 
  on 
  the 
  whole 
  more 
  marked, 
  owing 
  especially 
  to 
  the 
  fact 
  

   that 
  pieces 
  of 
  the 
  culture 
  medium 
  remaining 
  on 
  the 
  tree 
  continued 
  to 
  

   grow 
  the 
  fungus 
  and 
  to 
  produce 
  the 
  spores 
  for 
  an 
  indefinite 
  time. 
  On 
  

   one 
  tree, 
  for 
  example, 
  the 
  scales 
  on 
  which 
  were 
  infected 
  June 
  17th 
  by 
  

   smearing 
  on 
  a 
  thick 
  paste 
  of 
  spores 
  from 
  a 
  culture 
  of 
  broth 
  and 
  corn 
  

   meal, 
  the 
  fungus 
  had 
  made 
  a 
  visible 
  start 
  by 
  the 
  5th 
  of 
  July. 
  A 
  few 
  

   scales 
  were 
  then 
  dead 
  with 
  a 
  noticeable 
  growth 
  of 
  the 
  fungus, 
  and 
  by 
  

   September 
  ist 
  this 
  growth 
  had 
  become 
  very 
  profuse 
  spreading 
  in 
  various 
  

   directions 
  from 
  two 
  to 
  four 
  feet 
  from 
  the 
  point 
  of 
  infection. 
  On 
  an- 
  

   other 
  tree, 
  similarly 
  treated 
  at 
  the 
  same 
  time, 
  the 
  fungus 
  growth 
  Septem- 
  

   ber 
  I 
  St 
  (about 
  two 
  and 
  a 
  half 
  months 
  after 
  infection) 
  had 
  become 
  very 
  

   profuse, 
  extending 
  downward 
  more 
  than 
  six 
  feet 
  and 
  upward 
  about 
  

   sixteen 
  inches 
  and 
  crossing 
  an 
  air 
  space 
  of 
  at 
  least 
  three 
  feet. 
  The 
  

   infection 
  material 
  was 
  still 
  growing 
  in 
  good 
  condition 
  and 
  bearing 
  large 
  

   numbers 
  of 
  spores. 
  

  

  On 
  the 
  final 
  visit 
  of 
  the 
  season, 
  made 
  by 
  Mr. 
  E. 
  B. 
  Forbes 
  to 
  

   Sparta 
  November 
  2d, 
  it 
  appeared 
  that 
  there 
  had 
  been 
  no 
  great 
  increase 
  

   in 
  the 
  growth 
  and 
  abundance 
  of 
  the 
  fungus 
  since 
  the 
  September 
  inspec- 
  

   tion, 
  but 
  that 
  in 
  a 
  number 
  of 
  cases 
  it 
  had 
  spread 
  from 
  limb 
  to 
  limb 
  in 
  

   such 
  a 
  manner 
  as 
  to 
  suggest 
  that 
  the 
  spores 
  had 
  been 
  conveyed 
  by 
  the 
  

   blowing 
  of 
  rain 
  drops 
  in 
  a 
  high 
  wind. 
  An 
  occasional 
  washed-out 
  

   appearance 
  and 
  pale 
  color 
  of 
  the 
  fungus 
  suggested 
  the 
  probability 
  that 
  

   the 
  recent 
  weather 
  had 
  been 
  too 
  cool 
  and 
  wet 
  for 
  its 
  rapid 
  spread. 
  

  

  The 
  fact 
  should 
  be 
  carefully 
  noted 
  that 
  however 
  generally 
  the 
  fun- 
  

   gus 
  was 
  distributed, 
  it 
  was 
  easy 
  to 
  find 
  everywhere 
  in 
  the 
  infected 
  area 
  

   scale 
  insects 
  still 
  living 
  and 
  apparently 
  not 
  invaded 
  by 
  it, 
  and 
  even 
  

   young 
  scales 
  crawling 
  about 
  in 
  considerable 
  number. 
  It 
  remains 
  to 
  be 
  

  

  