…the mass. However, both of those numbers contain two contributions, one the electromagnetic energy and the other the stressors, the Poincare stress, momentum, and energy. Only when they're added together do you get a consistent theory. And therefore, it is…

…eh? Is this a... In this lecture, I want to continue to discuss the consequences of the principle of relativity of Einstein and Poincare to the ideas of physics and the ideas in other branches of the world. Just to remind you, I'm going to give again…

…Just to remind you, I'm going to give again a statement of the principle of relativity, this time the statement made by Poincare. He said, according to the principle of relativity, the laws of physical phenomena must be the same for a fixed observer as…

…talk of a conspiracy, that every time there's a phenomenon, there's another phenomenon which undoes it. And ultimately, of course, as Poincare pointed out, a complete conspiracy is a law of nature. So he proposed that. That's a law, that there'll always be…