﻿74 
  Scientific 
  Intelligence. 
  

  

  Survey, 
  J. 
  W. 
  Powell, 
  Director). 
  — 
  The 
  latest 
  volumes 
  of 
  this 
  

   valuable 
  series 
  are 
  Nos. 
  IX 
  and 
  X 
  for 
  the 
  years 
  1892 
  and 
  1893 
  

   respectively. 
  They 
  have 
  been 
  issued 
  under 
  the 
  able 
  editorship 
  of 
  

   Mr. 
  David 
  T. 
  Day, 
  and 
  like 
  the 
  earlier 
  volumes, 
  contain 
  a 
  large 
  

   amount 
  of 
  interesting 
  and 
  useful 
  data 
  in 
  regard 
  to 
  the 
  present 
  

   condition 
  and 
  recent 
  growth 
  of 
  the 
  mineral 
  industries 
  of 
  this 
  

   country. 
  

  

  8. 
  Physikalische 
  Krystallographie 
  und 
  Elnleltung 
  in 
  die 
  kryst- 
  

   allographische 
  Kenntniss 
  der 
  wichtigeren 
  Substanzen 
  ; 
  von 
  Paul 
  

   Groth. 
  Dritte 
  vollstandig 
  neu 
  bearbeitete 
  Auflage, 
  I 
  und 
  II 
  

   Abtheilung, 
  physikalische 
  und 
  geometrische 
  Eigenschaften 
  der 
  

   Krystalle, 
  528 
  pp. 
  8vo. 
  Leipzig, 
  1894 
  (Wm. 
  Engelmann). 
  — 
  

   Ever 
  since 
  the 
  publication 
  of 
  the 
  first 
  edition 
  in 
  1876, 
  the 
  Phy- 
  

   sikalische 
  Krystallographie 
  of 
  Professor 
  Groth 
  has 
  been 
  the 
  

   standard 
  work 
  in 
  this 
  subject 
  for 
  the 
  mineralogists 
  of 
  all 
  lands. 
  

   In 
  the 
  second 
  edition, 
  issued 
  in 
  1885, 
  the 
  work 
  was 
  rewritten 
  

   throughout 
  and 
  much 
  enlarged, 
  and 
  the 
  same 
  is 
  true 
  to 
  even 
  

   greater 
  extent 
  of 
  the 
  present 
  third 
  edition. 
  The 
  author's 
  keen 
  

   mind 
  and 
  long 
  experience 
  as 
  a 
  teacher 
  have 
  enabled 
  him 
  to 
  

   present 
  the 
  subjects 
  of 
  crystallography 
  and 
  the 
  general 
  physics 
  

   of 
  crystals 
  with 
  rare 
  clearness 
  and 
  system, 
  as 
  all 
  know 
  who 
  have 
  

   used 
  the 
  earlier 
  editions. 
  This 
  is 
  conspicuously 
  true 
  of 
  the 
  work 
  

   in 
  its 
  present 
  form, 
  which 
  contains 
  much 
  that 
  is 
  new 
  and 
  sugges- 
  

   tive 
  particularly 
  in 
  the 
  discussion 
  of 
  the 
  symmetry 
  of 
  crystals 
  and 
  

   their 
  classification 
  based 
  upon 
  this. 
  Two 
  parts 
  of 
  the 
  third 
  edi- 
  

   tion 
  only 
  have 
  thus 
  far 
  appeared, 
  but 
  the 
  third, 
  upon 
  the 
  methods 
  

   of 
  calculation 
  applied 
  to 
  crystals, 
  instruments 
  and 
  methods 
  of 
  

   investigation, 
  is 
  promised 
  in 
  a 
  few 
  months. 
  

  

  9. 
  A 
  Manual 
  of 
  Micro 
  chemical 
  Analysis; 
  by 
  Professor 
  H. 
  

   Behrens, 
  of 
  the 
  Polytechnic 
  School 
  in 
  Delft, 
  Holland, 
  with 
  an 
  

   introductory 
  chapter 
  by 
  Professor 
  John 
  W. 
  Judd 
  of 
  the 
  Royal 
  

   College 
  of 
  Science, 
  London. 
  246 
  pp. 
  8vo. 
  London 
  and 
  New 
  

   York, 
  1894 
  (Macmillan 
  & 
  Co.) 
  — 
  Workers 
  in 
  Petrography 
  and 
  all 
  

   who 
  have 
  occasion 
  to 
  use 
  the 
  now 
  well 
  developed 
  microchemical 
  

   methods 
  will 
  welcome 
  this 
  admirable 
  volume. 
  The 
  original 
  con- 
  

   tributions 
  of 
  the 
  author 
  to 
  this 
  subject 
  are 
  well 
  known, 
  but 
  his 
  

   work 
  on 
  Mikrochemische 
  Methoden 
  is 
  not 
  readily 
  accessible 
  to 
  the 
  

   English 
  student 
  and 
  hence 
  this 
  translation 
  made 
  by 
  him 
  will 
  be 
  

   highly 
  appreciated. 
  The 
  value 
  of 
  the 
  work 
  is 
  increased 
  by 
  the 
  

   fact 
  that 
  the 
  author's 
  manuscript 
  has 
  been 
  revised 
  by 
  Prof. 
  J. 
  W. 
  

   Judd, 
  who 
  with 
  the 
  assistance 
  of 
  Mr. 
  A. 
  E. 
  Tutton, 
  has 
  also 
  seen 
  

   it 
  through 
  the 
  press. 
  A 
  brief 
  but 
  interesting 
  introduction, 
  in 
  part 
  

   historical, 
  in 
  part 
  descriptive, 
  has 
  been 
  added 
  by 
  Professor 
  Judd. 
  

  

  10. 
  Handbuch 
  der 
  Miner 
  alogie 
  ; 
  von 
  Dr. 
  C. 
  Hintze. 
  Achte 
  

   Lieferung, 
  pp. 
  1121-1280. 
  Leipzig, 
  1894 
  (Veit 
  & 
  Co.).— 
  The 
  

   eighth 
  part 
  of 
  Hintze's 
  great 
  work 
  has 
  appeared 
  recently. 
  It 
  em- 
  

   braces 
  the 
  close 
  of 
  the 
  Pyroxene 
  group, 
  the 
  Amphibole 
  group 
  and 
  

   the 
  opening 
  pages 
  on 
  the 
  species 
  beryl. 
  

  

  