Journey to the Center of the Earth.

A German professor deciphers a runic message in an old manuscript. It outlines a route to the center of the Earth. He sets off with his nephew and an Icelandic guide. They enter an Icelandic volcano and begin the descent through successive layers of rock. The travelers carry scientific instruments and measure temperature, pressure, and distance as they go. Verne presents each stage of the journey through these observations and the practical problems of food, light, and direction. The novel follows the expedition's progress without exaggeration.