﻿284 
  ANNUAL 
  REPORT 
  SMITHSONIAN 
  INSTITUTION, 
  1922. 
  

  

  The 
  two 
  vessels 
  had 
  gone 
  over 
  an 
  area 
  of 
  34,000 
  square 
  miles 
  be- 
  

   tween 
  Point 
  Descanso 
  and 
  San 
  Francisco 
  Bay, 
  measuring 
  depths 
  

   5, 
  or 
  at 
  most 
  10, 
  miles 
  apart 
  over 
  the 
  whole 
  range 
  of 
  depth 
  from 
  

   100 
  to 
  2,000 
  fathoms. 
  They 
  had 
  cruised 
  over 
  5,800 
  miles 
  in 
  38 
  days 
  

   of 
  sounding. 
  Most 
  Of 
  the 
  work 
  was 
  done 
  while 
  moving 
  at 
  12 
  knots 
  

   per 
  hour. 
  Had 
  this 
  program 
  been 
  attempted 
  with 
  the 
  old 
  methods 
  

   it 
  might 
  well 
  have 
  occupied 
  the 
  better 
  part 
  of 
  a 
  year. 
  

  

  