Chapter 6

GREAT PROJECTS OF PHYSICAL CHANGE ACCOMPLISHED OR PROPOSED BY MAN.

Cutting of Isthmuses--Canal of Suez--Maritime Canals in Greece--Canals to Dead Sea--Canals to Libyan Desert--Maritime Canals in Europe--Cape Cod Canal--Changes in Caspian--Diversion of the Nile--Diversion of the Rhine--Improvements in North American Hydrography--Soil below Rock--Covering Rock with Earth--Desert Valleys--Effects of Mining--Duponchel's Plans of Improvement--Action of Man on the Weather--Resistance to Great Natural Forces--Incidental Effects of Human Action--Nothing Small In Nature

THE EARTH AS MODIFIED BY HUMAN ACTION.