<page_title> English brewery cask units </page_title> <section_title> Chart </section_title> <table> <cell> 51 <col_header> hogshead </col_header> </cell> <cell> ale gallons <col_header>  </col_header> </cell> <cell> 1688 <col_header> Year designated </col_header> </cell> <cell> = 235.7 L <col_header> hogshead </col_header> </cell> </table>
In 1688 the ale hogshead was defined to be 51 ale gallons (235.7 l).