National Geographic : 1939 Oct
©Reginald A.Bourlay WONDERS OF VICTORIA FALLS ARE REVEALED WEEKLY TO PASSENGERS ON THE REGULAR BULAWAYO-LIVINGSTONE AIR ROUTE Waters of the Zambezi River, flowing over an even sheet of basalt, plunge abruptly over the edge of an almost vertical chasm. Here the river ismore than 1800 yards wide. From 62 to 100 million gallons of water pour over the edge every minute. Only when the Zambeziisvery low isitpossible tolook into the depths of the chasm 420 feet deep at its center, because of the clouds of spray. David Livingstone discovered the spectacularfalls in1855.