“A physicist will look upon the world from the point of view of the STRUCTURE OF MATTER; it will be a world of molecules or atoms, or electrons. Fragments: Four

I ought to say at this point that the “three octaves of radiations” and the “table of hydrogens” derived from them were a stumbling block to us for a long time. The fundamental and the most essential principle of the transition of the triads and the STRUCTURE OF MATTER I understood only later, and I will speak of it in its proper place. Fragments: Nine

I have preserved in my memory one episode. It happened at one of the repetitions of this lecture on the STRUCTURE OF MATTER in connection with the mechanics of the universe. The lecture was read by P., a young engineer belonging to G.'s Moscow pupils, whom I have mentioned. Fragments: Nine