(continues from Part II ) A glowing hot body and its entropy, when tied tightly together, composed an enigma, about the nature of matter. As Marie, Pierre and Roentgen, discovered radioactivity anon, Rutherford would design, an alpha-particle gun. Charges as flesh and seeds of a melon, modeling material composition, he verily shattered, by elegant demonstrations. Foils of gold showed nuclear cores, quite positive and dense, blanketed by material wispy, negative, to balance. A bold, young, patent clerk, had also arrived by 19-Oh-five, as he put forth, four ideas he had contrived. In gendanken, he'd glimpse, visions unifying space-and-time, by another he'd explain, the motion of a pollen grain. His third established equivalence, between matter and energy, while the fourth resurrected, light’s corpuscularity. The latter of these allowed Bohr, to quantize an atomic theory, so physics again could explain, matter's stability! New tools in hand, ahead raced experiments, to test n...