﻿Chemistry 
  and 
  Physics. 
  563 
  

  

  pure 
  product 
  in 
  a 
  mixture 
  of 
  ethylene 
  bromide 
  and 
  alcohol, 
  the 
  

   comparatively 
  light 
  metal 
  was 
  separated 
  from 
  the 
  oxide 
  present 
  

   as 
  an 
  impurity. 
  The 
  melting-point 
  of 
  the 
  metal 
  is 
  about 
  1280° 
  C. 
  

   The 
  fused 
  metal 
  is 
  very 
  hard, 
  scratches 
  glass 
  and 
  is 
  only 
  slightly 
  

   marked 
  with 
  a 
  file. 
  It 
  is 
  steel-gra}^ 
  in 
  color 
  (not 
  silver- 
  white, 
  as 
  

   stated 
  by 
  Delray). 
  The 
  specific 
  gravity 
  is 
  1-842, 
  and 
  the 
  atomic 
  

   volume 
  4-94. 
  It 
  resists 
  the 
  action 
  of 
  water, 
  but 
  nitric 
  acid 
  readily 
  

   dissolves 
  it. 
  — 
  Berichte, 
  xlvi, 
  No. 
  7. 
  h. 
  l. 
  w. 
  

  

  3. 
  General 
  Chemistry, 
  Theoretical 
  and 
  Applied 
  ; 
  by 
  J. 
  C. 
  

   Blake. 
  8vo, 
  pp. 
  41V. 
  New 
  York, 
  1913 
  (The 
  Macmillan 
  Com- 
  

   pany. 
  Price 
  $1.90, 
  net). 
  — 
  This 
  text-book 
  is 
  intended 
  primarily 
  

   for 
  the 
  use 
  of 
  college 
  students 
  whose 
  study 
  of 
  the 
  subject 
  lasts 
  

   only 
  one 
  year. 
  While 
  the 
  book 
  contains 
  much 
  chemical 
  infor- 
  

   mation 
  and 
  possesses 
  a 
  number 
  of 
  good 
  features, 
  it 
  does 
  not 
  

   appear 
  to 
  be 
  an 
  improvement 
  upon 
  most 
  of 
  the 
  many 
  existing 
  

   books 
  covering 
  nearly 
  the 
  same 
  ground. 
  It 
  is 
  sparsely 
  illustrated, 
  

   although 
  a 
  few 
  of 
  the 
  illustrations, 
  being 
  copied 
  from 
  standard 
  

   works, 
  are 
  excellent. 
  There 
  are 
  a 
  good 
  many 
  unsatisfactory 
  state- 
  

   ments 
  and 
  too 
  many 
  mistakes 
  in 
  facts. 
  It 
  professes 
  to 
  introduce 
  

   the 
  subject 
  in 
  a 
  novel 
  way, 
  through 
  thermo-chemistry, 
  and 
  at 
  the 
  

   start 
  a 
  table 
  of 
  calorific 
  values 
  for 
  the 
  oxidation 
  of 
  a 
  number 
  of 
  

   metals 
  is 
  given. 
  This 
  does 
  not 
  seem 
  to 
  be 
  enlightening 
  to 
  the 
  

   student, 
  who 
  may 
  not 
  be 
  supposed 
  to 
  know, 
  as 
  yet, 
  anything 
  

   about 
  either 
  the 
  metals 
  or 
  their 
  oxides; 
  and, 
  further, 
  while 
  a 
  good 
  

   many 
  thermo-chemical 
  equations 
  are 
  given 
  through 
  the 
  book, 
  it 
  

   does 
  not 
  appear 
  that 
  the 
  " 
  calorie 
  " 
  is 
  defined 
  or 
  explained 
  any- 
  

   where. 
  Moreover, 
  in 
  the 
  last 
  chapter 
  the 
  statement 
  is 
  made 
  that 
  

   the 
  calorific 
  value 
  of 
  a 
  coal 
  can 
  be 
  determined 
  by 
  burning 
  it 
  in 
  a 
  

   calorimeter, 
  but 
  how 
  this 
  is 
  done, 
  or 
  what 
  a 
  calorimeter 
  is, 
  is 
  not 
  

   explained 
  at 
  all. 
  On 
  the 
  whole, 
  the 
  publication 
  of 
  this 
  book 
  does 
  

   not 
  seem, 
  to 
  the 
  reviewer, 
  to 
  have 
  been 
  worth 
  while. 
  h. 
  l. 
  w. 
  

  

  4. 
  A 
  Dictionary 
  of 
  Applied 
  Chemistry 
  / 
  by 
  Sir 
  Edward 
  

   Thorpe, 
  Assisted 
  by 
  Eminent 
  Contributors. 
  Revised 
  and 
  En- 
  

   larged 
  Edition. 
  Vol. 
  IV; 
  large 
  8vo, 
  pp. 
  727. 
  London, 
  1913 
  

   (Longmnns, 
  Green 
  and 
  Co.). 
  — 
  The 
  present 
  volume 
  of 
  this 
  impor- 
  

   tant 
  work 
  of 
  reference 
  covers 
  the 
  portion 
  of 
  the 
  alphabet 
  including 
  

   oilstone 
  and 
  soda-nitre. 
  Among 
  the 
  more 
  extensive 
  articles 
  

   are 
  those 
  on 
  oxygen, 
  ozone, 
  paints, 
  paper, 
  paraffine, 
  petroleum, 
  

   phenol 
  and 
  its 
  homologues, 
  phosphorus, 
  photography 
  (34 
  pages), 
  

   pigments, 
  polarimetry, 
  potassium, 
  pottery 
  and 
  porcelain, 
  proteins, 
  

   pyrometry, 
  quinoline, 
  quinones, 
  radioactivity, 
  resins, 
  rubber, 
  

   saponification, 
  sewage, 
  silver, 
  soap, 
  etc. 
  These 
  very 
  excellent 
  and 
  

   extensive 
  monographs, 
  together 
  with 
  a 
  great 
  many 
  shorter 
  arti- 
  

   cles, 
  make 
  the 
  volume 
  very 
  attractive 
  and 
  useful. 
  h. 
  l. 
  w. 
  

  

  5. 
  General 
  and 
  Industrial 
  Organic 
  Chemistry 
  ; 
  by 
  Dr. 
  Ettork 
  

   Molinari, 
  Translated 
  from 
  the 
  Second 
  Enlarged 
  and 
  Revised 
  

   Italian 
  Edition 
  by 
  Thomas 
  H. 
  Pope. 
  Large 
  8vo, 
  pp. 
  770. 
  Phila- 
  

   delphia, 
  1913 
  (P. 
  Blakiston's 
  Son 
  & 
  Co. 
  Price 
  $6.00). 
  — 
  This 
  is 
  

   a 
  very 
  noteworthy 
  work, 
  as 
  it 
  is 
  a 
  treatise 
  on 
  general 
  organic 
  

   chemistry 
  in 
  which 
  not 
  only 
  is 
  the 
  theoretical 
  side 
  considered 
  but 
  

  

  