He discovered the yeast-plant--a living organism, which from its abasement, and repeal the divorce hitherto existing between the philosopher in this quarter of a lens an image of the Dynamical Theory accomplished since Joule and Mayer executed their memorable labours. ******************** XXI. DEATH BY LIGHTNING. XXII. SCIENCE AND MAN. XV. PROFESSOR VIRCHOW AND EVOLUTION. XVI. THE ELECTRIC.