﻿Chemistry 
  and 
  Physics. 
  . 
  445 
  

  

  paring 
  the 
  volume 
  in 
  as 
  short 
  a 
  time 
  as 
  possible. 
  The 
  unavoid- 
  

   able 
  haste 
  in 
  compilation 
  affords 
  an 
  ample 
  excuse 
  for 
  the 
  fact 
  

   that 
  the 
  volume 
  contains 
  a 
  relatively 
  enormous 
  number 
  of 
  prac- 
  

   tical 
  errors 
  and 
  inconsistencies. 
  The 
  following 
  typical 
  examples 
  

   will 
  suffice, 
  (a) 
  On 
  page 
  49 
  the 
  very 
  commendable 
  statement 
  

   is 
  made 
  that 
  : 
  ' 
  ' 
  The 
  term 
  ' 
  battery 
  ' 
  is 
  sometimes 
  incorrectly 
  used 
  

   to 
  mean 
  one 
  such 
  cell." 
  Nevertheless, 
  figure 
  3 
  shows 
  a 
  single 
  

   dry 
  cell 
  with 
  the 
  legend 
  "Battery," 
  and 
  this 
  term 
  is 
  frequently 
  

   applied 
  to 
  a 
  single 
  unit 
  throughout 
  the 
  text, 
  (b) 
  In 
  many 
  cases, 
  

   the 
  cross-references 
  to 
  the 
  numbered 
  articles 
  are 
  incorrect 
  and 
  

   misleading, 
  sometimes 
  even 
  referring 
  to 
  an 
  eighth 
  chapter 
  which 
  

   was 
  not 
  included 
  in 
  the 
  volume, 
  (c) 
  In 
  figures 
  37, 
  38, 
  and 
  42 
  

   the 
  wrong 
  polarity 
  is 
  marked 
  on 
  the 
  conventional 
  symbol 
  for 
  a 
  

   cell. 
  This 
  might 
  lead 
  to 
  a 
  misinterpretation 
  of 
  figures 
  246, 
  251, 
  

   and 
  268, 
  which 
  are 
  self-consistent 
  and 
  conventionally 
  correct. 
  

   Finally, 
  the 
  volume 
  does 
  not 
  include 
  an 
  index. 
  h. 
  s. 
  u. 
  

  

  II. 
  Geology 
  and 
  Mineralogy. 
  

  

  1. 
  The 
  Trias 
  of 
  New 
  Zealand; 
  by 
  Charles 
  T. 
  Trechman, 
  

   Quart, 
  Jour. 
  Geol. 
  Soc, 
  Vol. 
  73, 
  pt, 
  3, 
  pp. 
  165-246, 
  London, 
  

   1918. 
  — 
  After 
  many 
  years, 
  gelogists 
  have 
  the 
  opportunity 
  of 
  com- 
  

   paring 
  the 
  Triassic 
  of 
  New 
  Zealand 
  with 
  that 
  of 
  the 
  northern 
  

   hemisphere 
  ; 
  the 
  previous 
  reports 
  being 
  meager 
  and 
  rather 
  inac- 
  

   curate. 
  Only 
  Upper 
  Triassic 
  faunas, 
  of 
  Carnic 
  and 
  Noric 
  age 
  

   are 
  known 
  there, 
  and 
  these, 
  while 
  having 
  some 
  faint 
  resemblance 
  

   to 
  those 
  already 
  known 
  in 
  Europe, 
  Asia 
  and 
  North 
  America, 
  are 
  

   strikingly 
  different. 
  Halobia 
  zitteli, 
  long 
  known 
  from 
  the 
  Arctic 
  

   region, 
  is 
  found 
  in 
  the 
  Carnic 
  stage 
  along 
  with 
  Halobia 
  cf. 
  

   austriaca, 
  DiscophyUites 
  cf. 
  ebneri, 
  and 
  Clydonautilus 
  cf. 
  spiro- 
  

   lobus, 
  of 
  Mediterranean 
  affinities. 
  Pseudomonotis 
  ochotica 
  in 
  

   the 
  Noric 
  horizon, 
  a 
  North 
  Pacific 
  and 
  Arctic 
  species, 
  occurs 
  

   along 
  with 
  Monotis 
  salinaria 
  of 
  the 
  ancient 
  Tethys. 
  We 
  have 
  

   here 
  a 
  strange 
  intermingling 
  of 
  European 
  and 
  Pacific 
  types. 
  

  

  The 
  greater 
  part 
  of 
  the 
  fauna, 
  however, 
  is 
  wholly 
  foreign 
  to 
  

   anything 
  known 
  in 
  the 
  northern 
  hemisphere, 
  with 
  brachiopods. 
  

   pelecypods 
  and 
  gastropods 
  predominating. 
  We 
  look 
  in 
  vain 
  for 
  

   the 
  rich 
  cephalopod 
  facies 
  that 
  characterizes 
  the 
  Upper 
  Triassic 
  

   of 
  the 
  Alps, 
  California, 
  and 
  India. 
  The 
  brachiopods 
  offer 
  the 
  

   characteristic 
  Triassic 
  genus 
  Halorella, 
  and 
  terebratuloids 
  are 
  not 
  

   uncommon. 
  But 
  the 
  most 
  unique 
  element 
  is 
  the 
  great 
  number 
  

   of 
  spiriferoids, 
  giving 
  a 
  Paleozoic 
  aspect 
  to 
  the 
  assemblage, 
  

   Spiriferina, 
  Retzia, 
  Mentzelia, 
  Spirigera, 
  Mentzeliopsis, 
  and 
  Hec- 
  

   toria, 
  the 
  last 
  two 
  being 
  new. 
  

  

  The 
  bivalves 
  offer 
  less 
  that 
  is 
  new, 
  those 
  described 
  being 
  

   mainly 
  the 
  conventional 
  types, 
  except 
  Hokonuia, 
  a 
  new 
  genus 
  

   somewhat 
  between 
  Lima 
  and 
  Myalina. 
  Even 
  more 
  interesting 
  

   than 
  new 
  species 
  or 
  genera 
  is 
  the 
  occurrence 
  of 
  characteristic 
  

  

  