Description
"Every mathematician knows it is impossible to understand an elementary course in thermodynamics." – V.I. Arnold, "Contact geometry: The geometrical method of Gibbs' thermodynamics" (1990)
"Physicists use the wave theory on Mondays, Wednesdays and Fridays and the particle theory on Tuesdays, Thursdays and Saturdays" – William Henry Bragg
"The liberties of our country, the freedom of our civil Constitution are worth defending at all hazards; and it is our duty to defend -them against all attacks. We have received them as a fair inheritance from our worthy ancestors. They purchased them for us with toil, and danger, and expense of treasure and blood, and transmitted them to us with care and…
Full description on the Flickr photo page.