As this volume begins, John Tyndall was a PhD student living in Marburg. He was unknown, almost broke, and working himself to the brink of mental and physical exhaustion in his determination to forge a reputation in science. In the period covered by this volume, he completed his degree, published his first scientific papers, became a regular participant in the British Association meetings, established friendships with leading men of science in Berlin and London, was elected Fellow of the Royal Society, and applied for, but failed to obtain, various scientific positions. As the volume ends, he...