﻿Jaggar 
  — 
  Lava 
  Flow 
  from 
  Mauna 
  Loa, 
  1916. 
  287 
  

  

  icant 
  and 
  there 
  was 
  little 
  smoke 
  or 
  fume. 
  The 
  solid 
  rock 
  

   built 
  up 
  of 
  lava 
  flows 
  which 
  bounded 
  the 
  inner 
  pit 
  with 
  funnel 
  

   slopes 
  was 
  so 
  affected 
  by 
  withdrawal 
  of 
  support 
  beneath 
  that 
  a 
  

   terrific 
  spalling 
  inward 
  of 
  this 
  rock 
  sent 
  up 
  red 
  avalanche 
  

   clouds, 
  upset 
  all 
  the 
  higher 
  remnants 
  of 
  recent 
  benches 
  and 
  

   changed 
  the 
  shape 
  of 
  Halemaumau 
  from 
  a 
  funnel 
  to 
  a 
  cylinder 
  

   with 
  vertical 
  and, 
  in 
  some 
  cases, 
  overhanging 
  walls. 
  

  

  Two 
  days 
  later 
  this 
  cylinder 
  was 
  700 
  feet 
  1^214 
  m.) 
  deep 
  with 
  

  

  Fig. 
  9. 
  

  

  Fig. 
  9. 
  Lava 
  pool 
  converted 
  to 
  torrent, 
  island 
  remnants 
  and 
  shoals, 
  

   Halemaumau, 
  June 
  5, 
  1916, 
  10:30 
  a. 
  m., 
  after 
  60 
  feet 
  (18 
  m.) 
  of 
  rapid 
  sub- 
  

   sidence, 
  looking 
  N.E. 
  Matches 
  fig. 
  8 
  on 
  the 
  left. 
  Photo. 
  Jaggar. 
  

  

  a 
  large 
  crusted 
  lava 
  pool 
  surrounded 
  by 
  talus 
  in 
  its 
  bottom. 
  

   After 
  June 
  9 
  rapid 
  recovery 
  took 
  place 
  and 
  for 
  twenty 
  -three 
  

   weeks 
  the 
  lava 
  rose 
  at 
  a 
  rate 
  averaging 
  3*31 
  feet 
  (1*01 
  m.) 
  per 
  

   day 
  and 
  the 
  rise 
  continues 
  at 
  the 
  time 
  of 
  writing 
  so 
  that 
  on 
  

   November 
  16, 
  1916, 
  the 
  depression 
  of 
  the 
  surface 
  was 
  only 
  161 
  

   feet 
  (19 
  m.) 
  below 
  the 
  rim 
  of 
  the 
  pit 
  (fig. 
  1). 
  

  

  Conclusions. 
  

  

  The 
  outflow 
  of 
  lava 
  in 
  1916 
  from 
  Mauna 
  Loa 
  brings 
  to 
  a 
  

   close 
  the 
  eruptive 
  period 
  of 
  that 
  volcano 
  1911-16.* 
  The 
  

  

  *Bull. 
  Hawaiian 
  Vole. 
  Obs'y, 
  April, 
  1915. 
  

  

  Am. 
  Jour. 
  Sci. 
  — 
  Fourth 
  Series, 
  Vol. 
  XLIII, 
  No. 
  256.— 
  April, 
  1917. 
  

   20 
  

  

  