﻿298 
  Scientific 
  Intelligence.- 
  

  

  Steel-making 
  Alloys 
  and 
  Graphite; 
  by 
  Charles 
  Morris 
  John- 
  

   son. 
  8vo, 
  pp. 
  437. 
  New 
  York 
  (John 
  Wiley 
  & 
  Sons, 
  Inc.). 
  — 
  

   In 
  recent 
  times 
  the 
  analytical 
  problems 
  of 
  steel-works 
  chemists 
  

   have 
  become 
  more 
  difficult 
  on 
  account 
  of 
  the 
  large 
  number 
  of 
  ele- 
  

   ments 
  requiring 
  determination 
  in 
  their 
  materials 
  and 
  products. 
  

   The 
  present 
  book 
  gives 
  the 
  methods 
  of 
  analysis 
  recommended 
  by 
  

   the 
  author 
  as 
  the 
  result 
  of 
  extensive 
  . 
  experience 
  in 
  this 
  work. 
  

   The 
  descriptions 
  give 
  full 
  details 
  and 
  show 
  many 
  points 
  of 
  orig- 
  

   inality 
  and 
  improvement 
  on 
  the 
  part 
  of 
  the 
  author. 
  The 
  second 
  

   edition 
  of 
  the 
  book, 
  now 
  under 
  consideration, 
  has 
  been 
  re-written 
  

   in 
  regard 
  to 
  iron 
  and 
  steel 
  and 
  its 
  alloys, 
  while 
  it 
  contains 
  added 
  

   chapters 
  on 
  the 
  testing 
  of 
  lubricating 
  oils, 
  coal, 
  iron 
  ores, 
  fluor- 
  

   spar, 
  limestone, 
  sand 
  and 
  fire-brick. 
  In 
  the 
  preface 
  to 
  this 
  last 
  

   edition 
  an 
  interesting 
  generalization 
  is 
  made: 
  "If 
  iron 
  be 
  com- 
  

   bined 
  by 
  fusion 
  with 
  notable 
  quantities 
  of 
  an 
  element 
  whose 
  

   melting 
  point 
  is 
  very 
  much 
  below 
  that 
  of 
  iron, 
  the 
  tendency 
  is 
  

   to 
  produce 
  a 
  metal 
  of 
  inferior 
  physical 
  properties, 
  but 
  if 
  iron 
  be 
  

   combined 
  with 
  an 
  element 
  whose 
  melting 
  point 
  is 
  nearly 
  that 
  or 
  

   higher 
  than 
  that 
  of 
  iron, 
  then 
  the 
  tendency 
  is 
  to 
  produce 
  a 
  metal 
  

   of 
  superior 
  physical 
  properties." 
  In 
  confirmation 
  of 
  this 
  view 
  

   it 
  is 
  a 
  striking 
  fact 
  that 
  the 
  beneficial 
  ingredients 
  of 
  steel, 
  carbon, 
  

   manganese, 
  tungsten, 
  vanadium, 
  chromium, 
  titanium, 
  molybde- 
  

   num, 
  nickel 
  and 
  cobalt, 
  all 
  have 
  high 
  melting 
  points, 
  while 
  the 
  

   low 
  melting 
  sulphur, 
  phosphorus, 
  tin, 
  bismuth, 
  arsenic, 
  antimony 
  

   and 
  even 
  copper 
  are 
  harmful. 
  The 
  book 
  is 
  a 
  particularly 
  useful 
  

   one 
  for 
  specialists 
  in 
  this 
  branch 
  of 
  analytical 
  work, 
  but 
  it 
  should 
  

   give 
  useful 
  suggestions 
  to 
  other 
  analysts. 
  h. 
  l. 
  w. 
  

  

  5. 
  A 
  Practice 
  Book 
  in 
  Elementary 
  Metallurgy 
  ; 
  by 
  Ernest 
  

   Edgar 
  Thum. 
  8vo, 
  pp. 
  313. 
  New 
  York, 
  1917 
  (John 
  Wiley 
  & 
  

   Sons, 
  Inc.). 
  — 
  This 
  book 
  has 
  been 
  prepared 
  particularly 
  for 
  the 
  

   use 
  of 
  students 
  at 
  the 
  Engineering 
  College, 
  University 
  of 
  Cin- 
  

   cinnati, 
  in 
  connection 
  with 
  a 
  course 
  of 
  laboratory 
  work. 
  Very 
  

   full 
  directions 
  are 
  given 
  concerning 
  the 
  apparatus 
  required 
  for 
  

   the 
  experiments 
  and 
  the 
  manner 
  in 
  which 
  they 
  are 
  to 
  be 
  per- 
  

   formed, 
  while 
  at 
  the 
  end 
  of 
  each 
  group 
  of 
  experiments 
  a 
  series 
  

   of 
  questions 
  is 
  presented 
  to 
  test 
  the 
  student's 
  understanding 
  of 
  

   his 
  work 
  and 
  his 
  knowledge 
  of 
  the 
  subject. 
  The 
  course 
  appears 
  

   to 
  have 
  been 
  well 
  selected, 
  as 
  it 
  embraces 
  a 
  large 
  variety 
  of 
  

   important 
  and 
  instructive 
  topics. 
  It 
  includes 
  work 
  with 
  various 
  

   kinds 
  of 
  furnaces, 
  the 
  measurement 
  of 
  high 
  temperatures, 
  a 
  con- 
  

   siderable 
  amount 
  of 
  metallography, 
  especially 
  in 
  connection 
  with 
  

   steel, 
  the 
  heat-treatment 
  of 
  steels, 
  hardness, 
  photomicrography, 
  

   etc. 
  As 
  appendices 
  there 
  is 
  a 
  good 
  chapter 
  on 
  elementary 
  metal- 
  

   lurgical 
  calculations 
  and 
  another 
  on 
  foundry 
  practice 
  with 
  a 
  

   glossary 
  of 
  its 
  technical 
  terms, 
  many 
  of 
  which, 
  as 
  is 
  well 
  known, 
  

   are 
  peculiar. 
  

  

  There 
  is 
  no 
  doubt 
  that 
  the 
  book 
  is 
  well 
  suited 
  for 
  giving 
  an 
  

   excellent 
  course 
  of 
  laboratory 
  work. 
  h. 
  l. 
  w. 
  

  

  