Sentence:  Again, by 28 Hen. VIII, cap. 14, it is re-enacted that the tun of wine should contain 252 gallons, a butt of Malmsey 126 gallons, a pipe 126 gallons, a tercian or puncheon 84 gallons, a hogshead 63 gallons, a tierce 41 gallons, a <WSD>barrel</WSD> 31.5 gallons, a rundlet 18.5 gallons. 
Meaning of the word marked with <WSD> tags:  The quantity which constitutes a full barrel: the volume or weight this represents varies by local law and custom.