4 ideas
468 | Musical performance can reveal a range of virtues [Damon of Ath.] |
15640 | Courage is not a virtue, but the form of every virtue at its testing point [Lewis,CS] |
20645 | Heat is a state of vibration, not a substance [Joule] |
20972 | Joule showed that energy converts to heat, and heat to energy [Joule, by Papineau] |