﻿CHAPTEE 
  V. 
  

  

  DATA 
  OBTAmED 
  FEOM 
  SOLAR 
  PHYSICS 
  AND 
  EAETH- 
  

   QUAKE 
  COMMOTIONS 
  APPLIED 
  TO 
  ELUCIDATE 
  LOCUST 
  

   MULTIPLICATION 
  AND 
  MIGEATION.^ 
  

  

  This 
  noble 
  lantern 
  of 
  the 
  world, 
  the 
  all- 
  vivifying, 
  pulsating 
  heart 
  of 
  

   the 
  universe, 
  in 
  the 
  opinion 
  of 
  Baron 
  von 
  Humboldt, 
  was 
  the 
  primary 
  

   source 
  of 
  light 
  and 
  of 
  radiating 
  heat, 
  and 
  the 
  generator 
  of 
  numerous 
  

   terrestrial 
  electro-magnetic 
  processes, 
  as 
  indeed 
  of 
  the 
  greater 
  part 
  of 
  

   the 
  organic 
  activity 
  upon 
  our 
  planet. 
  It 
  is 
  the 
  suu-power 
  that 
  gives 
  

   rise 
  to 
  alterations 
  on 
  the 
  surtace 
  of 
  the 
  earth, 
  and 
  that 
  conjoins 
  with 
  

   lunar 
  attraction 
  in 
  producing 
  the 
  mounting 
  of 
  the 
  spring-tide. 
  It 
  is 
  the 
  

   solar 
  rays 
  that 
  move 
  the 
  atmospheric 
  and 
  oceanic 
  currents 
  5 
  that 
  evoke 
  

   the 
  colored 
  coruscations 
  of 
  the 
  polar 
  light 
  5 
  thunder 
  and 
  lightning, 
  hur- 
  

   ricanes 
  and 
  waterspouts, 
  speak 
  of 
  their 
  action 
  ; 
  and 
  it 
  is 
  no 
  less 
  the 
  

   solar 
  rays 
  that 
  evoke 
  the 
  all-silent 
  forces 
  of 
  chemical 
  attraction 
  and 
  

   that 
  variously 
  determine 
  organic 
  life 
  in 
  the 
  endosmoseof 
  cell-walls 
  and 
  

   in 
  the 
  tissue 
  of 
  muscular 
  and 
  nervous 
  fibers 
  (Cosmos, 
  Trans, 
  by 
  Otte 
  

   and 
  Paul, 
  p. 
  359). 
  This 
  portion 
  of 
  solar 
  physics 
  is 
  now 
  so 
  generally 
  un- 
  

   derstood 
  that 
  it 
  becomes 
  unnecessary 
  to 
  adduce 
  the 
  opinions 
  of 
  other 
  

   learned 
  authors, 
  or 
  to 
  refer 
  to 
  an 
  endless 
  and 
  mundane 
  bibliography 
  ; 
  

   although 
  it 
  may 
  not 
  be 
  out 
  of 
  place 
  to 
  remark, 
  that 
  the 
  couception 
  of 
  

   the 
  sun 
  being 
  a 
  great 
  electro-magnetic 
  globe 
  would 
  seem 
  to 
  possess 
  no 
  

   small 
  claim 
  to 
  be 
  considered 
  the 
  predominant 
  one 
  ; 
  and 
  many 
  doubtless 
  

   are 
  of 
  opinion 
  that 
  the 
  stellar 
  forces 
  of 
  rotation, 
  revolution, 
  oscillation 
  

   (natation 
  and 
  obliquity 
  of 
  the 
  ecliptic), 
  gravitation, 
  and 
  chemical 
  affinity, 
  

   should 
  be 
  considered 
  as 
  phenomena 
  induced 
  by 
  its 
  action. 
  (I 
  notice 
  an 
  

   observation 
  on 
  this 
  subject 
  in 
  the 
  Journal 
  of 
  Science 
  for 
  March, 
  1882, 
  

   p. 
  122.) 
  

  

  Be 
  this 
  inference 
  as 
  it 
  may, 
  certain 
  is 
  it 
  that 
  the 
  scientific 
  mind 
  since 
  

   the 
  days 
  of 
  Humboldt 
  has 
  become 
  gradually 
  reawakened 
  to 
  the 
  circum- 
  

   stance 
  that 
  a 
  large 
  class 
  of 
  terrestrial 
  phenomena 
  on 
  which 
  mankind 
  

   depends 
  for 
  the 
  future 
  development 
  of 
  its 
  resources 
  are 
  not 
  only 
  ruled 
  

   by 
  the 
  earth's 
  diurnal 
  revolution 
  and 
  annual 
  circuit 
  round 
  the 
  sun, 
  but 
  

   are 
  likewise 
  immediately 
  controlled 
  by 
  a 
  recurring 
  variation 
  in 
  the 
  

   potent 
  energy 
  of 
  the 
  central 
  luminary 
  of 
  our 
  system 
  itself. 
  Terrestrial 
  

  

  sptepared 
  and 
  communicated 
  to 
  the 
  Commission 
  by 
  Mr. 
  A. 
  H. 
  Swinton, 
  of 
  Binfield 
  Home, 
  GuUd- 
  

   ford, 
  Surrey, 
  England, 
  who 
  has 
  given 
  much 
  attention 
  to 
  insect 
  periodicity 
  and 
  to 
  whom 
  we 
  hereby 
  ten 
  

   der 
  our 
  acknowledgements 
  without 
  endorsing 
  all 
  the 
  author's 
  views. 
  

  

  5 
  E 
  65 
  

  

  