﻿F. 
  A. 
  Per 
  ret 
  — 
  Some 
  Kilauean 
  Formations. 
  

  

  153 
  

  

  most 
  cliaotic 
  of 
  fragmentary 
  ejecta 
  from 
  more 
  acid 
  and 
  explo- 
  

   sive 
  volcanoes. 
  The 
  cones 
  often 
  appear 
  upon 
  the 
  newly 
  formed 
  

   -• 
  shore" 
  of 
  the 
  Halemaumau 
  lava 
  lake 
  and 
  are 
  then 
  of 
  the 
  

   greatest 
  value 
  to 
  the 
  investigator 
  as 
  offering 
  a 
  means 
  — 
  by 
  the 
  

   introduction 
  of 
  a 
  tube 
  through 
  an 
  orifice 
  of 
  the 
  blow-cone 
  — 
  of 
  

  

  Fig. 
  2. 
  

  

  Fig. 
  2. 
  A 
  typical 
  spatter 
  cone. 
  

  

  collecting 
  the 
  gases 
  emanating 
  directly 
  from 
  the 
  active 
  lava 
  

   and 
  before 
  their 
  modifications 
  by 
  contact 
  with 
  the 
  air.* 
  

  

  Closely 
  allied 
  to 
  the 
  above-mentioned 
  gas-expanded 
  cham- 
  

   bers 
  along 
  the 
  line 
  of 
  a 
  flow 
  — 
  and, 
  in 
  some 
  instances, 
  identical 
  

  

  * 
  As 
  has 
  already 
  been 
  shown 
  in 
  preceding 
  papers 
  of 
  the 
  present 
  series, 
  

   these 
  gases 
  bum 
  on 
  coming 
  in 
  contact 
  with 
  the 
  atmosphere. 
  

  

  