Fig=1978-033.   <a href=../..>Home</a> - <a href=b034.html>Next</a>
<p><img src=../big/033.jpg><p>
<strong>Vibrator 9-68 cycles/second.</strong>
<br>
(Seismic recording crew in operation.  Instrument truck foreground, five vibrators aligned in background)
<p>See <a href= m033.html>smaller pictures.</a>