Caption: James Joule (1818-1889) was a 19th century scientist in the field of thermodynamics---and he was also a brewer---you can have a Joule's. He is the eponym of the metric system energy unit the joule (J).
For more on James Joule (1818-1889), see Physics file: james_joule.html.
One of the curses of discussions about energy and power in society is the use of inconsistent and meaningless units.
A few useful conversions with remarks:
Credit/Permission:
Henry Roscoe (1833--1915)
from
Sir Henry Enfield Roscoe,
The Life & Experiences of Sir Henry Enfield Roscoe, 1906, Macmillan: London and New York,
p. 120 plate
(uploaded to Wikipedia
by User:Astrochemist,
2007) /
Public domain.
Image link: Wikipedia:
File:Joule James sitting.jpg.
Local file: local link: energy_units.html.
File: Physics file:
energy_units.html.