﻿522 
  Scientific 
  Intelligence. 
  

  

  Garden, 
  properly 
  so-called, 
  there 
  is, 
  as 
  in 
  Dunedin, 
  in 
  New 
  

   Zealand, 
  and 
  Geelong, 
  in 
  Victoria, 
  a 
  public 
  garden, 
  in 
  which 
  a 
  

   good 
  deal 
  of 
  attention 
  is 
  given 
  to 
  the 
  exhibition 
  of 
  native 
  plants. 
  

  

  Can 
  there 
  be 
  any 
  valid 
  excuse 
  urged 
  by 
  the 
  young 
  and 
  flourish- 
  

   ing 
  cities 
  of 
  our 
  own 
  country 
  for 
  not 
  providing 
  for 
  the 
  public, 
  

   these 
  simple 
  and 
  useful 
  means 
  for 
  popular 
  instruction 
  ? 
  

  

  To 
  serve 
  as 
  a 
  basis 
  for 
  comparison 
  with 
  our 
  own 
  communities, 
  

   it 
  is 
  thought 
  best 
  to 
  subjoin 
  a 
  few 
  statistics 
  relative 
  to 
  population 
  

   taken 
  from 
  Hiibner's 
  Statistische 
  Tabellen. 
  The 
  figures 
  apply 
  

   to 
  the 
  towns 
  and 
  cities 
  of 
  which 
  mention 
  has 
  been 
  made 
  in 
  the 
  

   sketches. 
  

  

  Melbourne 
  and 
  suburbs 
  _ 
  410,000 
  

  

  Sydney 
  357,000 
  

  

  Adelaide 
  128,000 
  

  

  Auckland 
  . 
  . 
  _ 
  57,000 
  

  

  Dunedin 
  _. 
  46,000 
  

  

  Christchurch_ 
  _ 
  _ 
  45,000 
  

  

  Brisbane 
  _ 
  _ 
  74,000 
  

  

  Wellington 
  28,000 
  

  

  Hobart 
  _ 
  . 
  _ 
  . 
  . 
  25,000 
  

  

  Geelong 
  21,000 
  

  

  These 
  figures, 
  which 
  are 
  only 
  approximate, 
  correspond 
  very 
  

   nearly 
  to 
  those 
  given 
  in 
  the 
  latest 
  Australian 
  Year-Book 
  (1890) 
  

   accessible 
  to 
  me. 
  Hiibner's 
  data 
  are 
  preferred, 
  because 
  the 
  year- 
  

   book 
  does 
  not 
  add 
  in 
  the 
  population 
  of 
  the 
  suburbs 
  of 
  some 
  of 
  

   the 
  cities. 
  In 
  fairness, 
  these 
  should 
  be 
  included. 
  

  

  It 
  would 
  seem 
  that 
  many 
  of 
  our 
  American 
  cities 
  and 
  towns 
  

   have 
  much 
  to 
  learn 
  from 
  these 
  smaller 
  communities 
  in 
  the 
  islands 
  

   of 
  the 
  South 
  Seas. 
  g. 
  l. 
  g. 
  

  

  IY. 
  Miscellaneous 
  Scientific 
  Intelligence. 
  

  

  1. 
  Analysis 
  of 
  the 
  ivater 
  of 
  the 
  Salt 
  lake, 
  Aliapaakai, 
  on 
  

   Oahu, 
  Hawaiian 
  Islands 
  ; 
  by 
  Prof. 
  Lyons 
  of 
  Oahu 
  College 
  

   (Dailv 
  Pacific 
  Comm. 
  Advertiser 
  of 
  Oahu, 
  Oct. 
  8, 
  1891).— 
  The 
  salt 
  

   lake 
  of 
  Oahu 
  is 
  situated 
  near 
  the 
  sea-level, 
  on 
  the 
  south 
  side 
  of 
  the 
  

   island, 
  in 
  a 
  basin 
  made 
  of 
  a 
  combination 
  of 
  shallow 
  craters 
  of 
  

   basaltic 
  tufa. 
  It 
  is 
  described 
  by 
  J. 
  D. 
  Dana 
  in 
  his 
  Expedition 
  Re- 
  

   port, 
  p. 
  245, 
  and 
  his 
  work 
  on 
  Volcanoes, 
  p. 
  297. 
  Its 
  position 
  may 
  

   be 
  seen 
  on 
  the 
  map 
  of 
  Oahu, 
  Plate 
  IV 
  of 
  volume 
  xxxvii 
  (1889) 
  

   of 
  this 
  Journal. 
  In 
  dry 
  seasons 
  the 
  bottom 
  of 
  the 
  lake 
  is 
  covered 
  

   with 
  a 
  deposit 
  of 
  crystallized 
  salt. 
  The 
  water 
  is 
  saturated 
  brine, 
  

   yet 
  it 
  differs 
  much 
  in 
  composition 
  from 
  the 
  brine 
  obtained 
  by 
  

   evaporating 
  to 
  saturation 
  ordinary 
  sea-water. 
  The 
  difference 
  is 
  

   strikingly 
  shown 
  on 
  mixing 
  the 
  two 
  clear 
  fluids, 
  when 
  a 
  copious 
  

   deposit 
  immediately 
  forms 
  of 
  sulphate 
  of 
  lime, 
  so 
  that 
  the 
  mix- 
  

   ture 
  almost 
  solidifies. 
  The 
  specific 
  gravity 
  of 
  the 
  water, 
  even 
  at 
  

   a 
  temperature 
  of 
  80° 
  F. 
  is 
  1,256. 
  The 
  water 
  of 
  the 
  Dead 
  Sea 
  is 
  

   considerably 
  lighter, 
  its 
  specific 
  gravity 
  having 
  been 
  found 
  by 
  

  

  