Processing of spermaceti. Grinding and pressing spermaceti for removal of taut-pressed oil.
Charles H. Stevenson
<a href="//commons.wikimedia.org/wiki/1902" title="1902">1902</a>
<a rel="nofollow" class="external text" href="http://www.photolib.noaa.gov/htmls/fish1399.htm">NOAA Photo Library</a>