Werner’s mind drifts; he is thinking about the book in his lap, The Principles of Mechanics by Heinrich Hertz. He discovered it in the church basement, water-stained and forgotten, decades old, and the rector let him bring it home, and Frau Elena let him keep it, and for several weeks Werner has been fighting through the thorny mathematics. Electricity, Werner is learning, can be static by itself. But couple it with magnetism, and suddenly you have movement—waves. Fields and circuits, conduction and induction. Space, time, mass. The air swarms with so much that is invisible! How he wishes he
...more
