CHAPTER I Unexpected Discovery It was Andersen's queer talk that marked the beginning of it for us. Of course, that wasn't the real beginning. I suppose you might say it really started when Becquerel first puzzled over his fogged photographic plates. But to us, Andersen's premonitions were the start. We called him the "Melancholy Dane." But that was just a joke, though his tall, cadaverous appearance fitted it. He wasn't really a gloomy sort, and was a first-class nuclear chemist. That was why h