\begin{definition}[Definition:Imperial/Volume/Hogshead]
The '''hogshead''' is an imperial unit of volume.
{{begin-eqn}}
{{eqn | o = 
      | r = 1
      | c = '''hogshead'''
}}
{{eqn | r = 2
      | c = barrels
}}
{{eqn | r = 0 \cdotp 29094 \, 976
      | c = cubic metres
}}
{{eqn | r = 290 \cdotp 94976
      | c = litres
}}
{{end-eqn}}
\end{definition}