﻿Obituary. 
  235 
  

  

  author 
  has 
  produced 
  a 
  volume 
  that 
  can 
  be 
  read 
  with 
  much 
  profit 
  

   and 
  without 
  fatigue 
  by 
  any 
  cultivated 
  person. 
  

  

  6. 
  The 
  Earth 
  Measured. 
  By 
  a 
  member 
  of 
  the 
  Chicago 
  Mathe- 
  

   matical 
  Society. 
  Pp. 
  40. 
  — 
  A 
  useful 
  collection 
  of 
  the 
  results 
  of 
  

   geodetic 
  measurements 
  with 
  related 
  quantities 
  for 
  Sun, 
  Moon 
  and 
  

   Jupiter. 
  

  

  7. 
  Leitfaden 
  far 
  den 
  Unterricht 
  in 
  der 
  anorganisclien 
  Chemie. 
  

   Didaktisch 
  bearbeitet 
  von 
  Dr. 
  Joachim 
  Sperber. 
  Erster 
  Teil. 
  

   8vo, 
  pp. 
  vi, 
  120. 
  Ziirich, 
  1S99. 
  (E. 
  Speidel.) 
  Mks, 
  2.40.— 
  

   The 
  first 
  part 
  of 
  a 
  simple 
  laboratory 
  manual 
  used 
  by 
  the 
  author 
  

   with 
  his 
  own 
  classes 
  and 
  serving 
  as 
  a 
  guide 
  to 
  the 
  more 
  elemen- 
  

   tary 
  physical 
  experiments. 
  These 
  are 
  well 
  described 
  and 
  fully 
  

   illustrated 
  ; 
  in 
  some 
  cases 
  with 
  full 
  page 
  cuts. 
  g. 
  f. 
  b. 
  

  

  S. 
  La 
  Tension 
  de 
  dissociation 
  avant 
  H. 
  Sainte 
  Claire 
  Deville. 
  

   Introduction 
  par 
  P. 
  Duhem 
  a 
  une 
  memoire 
  De 
  Vinfluence 
  de 
  la 
  

   pression 
  sur 
  les 
  actions 
  chimiques. 
  Par 
  Georges 
  Aime 
  (1837). 
  

   Svo, 
  pp. 
  32, 
  Paris, 
  1899. 
  (A. 
  Herrmann.) 
  — 
  This 
  brochure 
  is 
  

   intended 
  to 
  clear 
  up 
  a 
  historic 
  point 
  in 
  science. 
  The 
  thesis 
  of 
  

   Aime 
  printed 
  in 
  1837, 
  as- 
  Duhem 
  states 
  in 
  his 
  introduction, 
  

   seems 
  to 
  show 
  clearly 
  that 
  this 
  physicist 
  had 
  conceived 
  the 
  

   idea 
  of 
  a 
  dissociation 
  tension 
  thirty 
  years 
  before 
  it 
  was 
  devel- 
  

   oped 
  by 
  Debray 
  and 
  Deville. 
  G. 
  f. 
  b. 
  

  

  Obituary. 
  

  

  Professor 
  Hexry 
  Allex 
  Hazex, 
  of 
  the 
  Forecast 
  Division 
  of 
  

   the 
  U. 
  S. 
  Weather 
  Bureau, 
  died 
  suddenly 
  at 
  Washington 
  on 
  Jan- 
  

   uary 
  23d, 
  as 
  the 
  result 
  of 
  an 
  accident. 
  He 
  was 
  born 
  January 
  12, 
  

   1849, 
  in 
  Sirur, 
  India, 
  the 
  son 
  of 
  missionaries 
  of 
  the 
  Congregational 
  

   church. 
  He 
  came 
  to 
  this 
  country 
  when 
  ten 
  years 
  old 
  and 
  was 
  

   educated 
  at 
  St. 
  Johnsbury, 
  Vermont, 
  and 
  at 
  Dartmouth 
  College, 
  

   where 
  he 
  was 
  graduated 
  in 
  1871. 
  After 
  this 
  for 
  four 
  years 
  he 
  

   was 
  instructor 
  in 
  drawing 
  in 
  the 
  Sheffield 
  Scientific 
  School 
  at 
  New 
  

   Haven, 
  and 
  subsequently 
  was 
  assistant 
  in 
  meteorology 
  and 
  phys- 
  

   ics 
  under 
  Professor 
  Elias 
  Loomis, 
  being 
  associated 
  with 
  him 
  in 
  

   meteorological 
  researches 
  and 
  the 
  preparation 
  of 
  his 
  "Contribu- 
  

   tions 
  to 
  Meteorology." 
  In 
  May, 
  1881, 
  he 
  became 
  connected 
  with 
  

   the 
  Signal 
  Service 
  aud 
  took 
  a 
  prominent 
  part 
  in 
  the 
  development 
  

   of 
  the 
  scientific 
  work 
  of 
  the 
  Bureau 
  in 
  accordance 
  with 
  the 
  plans 
  

   of 
  the 
  chief 
  signal 
  officer, 
  Gen. 
  William 
  B. 
  Hazen. 
  Besides 
  the 
  

   work 
  specially 
  belonging 
  to 
  him, 
  as 
  the 
  deduction 
  of 
  altitudes 
  by 
  

   railroad 
  levels, 
  the 
  study 
  of 
  the 
  psychrorneter, 
  the 
  proper 
  exposure 
  

   of 
  thermometers, 
  the 
  study 
  of 
  thunder 
  storms, 
  etc., 
  he 
  devoted 
  

   himself 
  also 
  to 
  such 
  subjects 
  as 
  barometric 
  hypsometry 
  and 
  the 
  

   reduction 
  to 
  sea 
  level, 
  the 
  testing 
  of 
  anemometers, 
  the 
  study 
  of 
  

   tornadoes 
  and 
  the 
  theories 
  of 
  cyclones, 
  atmospheric 
  electricity, 
  

   balloon 
  ascensions, 
  the 
  influence 
  of 
  sun 
  spots 
  and 
  the 
  moon, 
  etc. 
  

   During 
  the 
  administration 
  of 
  General 
  Greely, 
  he 
  became 
  a 
  junior 
  

   professor 
  at 
  a 
  higher 
  salary 
  and 
  was 
  assigned 
  to 
  official 
  duties 
  of 
  

   broader 
  aspect. 
  He 
  frequently 
  took 
  his 
  turn 
  as 
  forecast 
  official 
  

  

  