CHAPTER XVII.

SUBTERRANEAN HEAT--ITS POWERS ILLUSTRATED BY UNDULATIONS OF THE EARTH’S CRUST.

Gentle Movements of the Earth’s Crust within Historic Times--Roman Roads and Temples submerged in the Bay of Baiæ--Temple of Jupiter Serapis--Singular Condition of its Columns--Proof of Subsidence and subsequent Upheaval--Indications of a second Subsidence now actually taking place--Gradual Upheaval of the Coast of Sweden--Summary of the Evidence adduced to establish this Fact--Subsidence of the Earth’s Crust on the West Coast of Greenland--Recapitulation, 271