Carpenter's new geographical reader; North America by Carpenter Frank G. (Frank George) 1855-1924

Author:Carpenter, Frank G. (Frank George), 1855-1924
Language: eng
Format: epub, pdf
Tags: Readers
Publisher: New York, Cincinnati [etc.] American Book Company
Published: 1922-03-25T05:00:00+00:00

But how do the steamers with their loads of freight dimb up and down these steps?

They cannot go from Ontario up the swift Niagara River and mount the falls; nor can they make their way up through the rocky rapids of the St. Marys River, over which the waters of Lake Superior foam as they rush on toward Lake Huron. No; that is impossible. The ships must be lifted or let down from one level to another by means of lock canals. Such canals have been built between Lake Ontario and Lake Erie, and around St. Marys Falls between Lake Huron and Lake Superior. There are other canals with locks around the rapids of the St. Lawrence. The surface of the Great Lakes is level and the steamers move back and forth as though on the ocean.

We are now^ ready to begin our trip down the lakes. The most wonderful feature of our voyage will be passing through the locks at St. Marys. Our steamer is a hollow shell of steel almost six hundred feet long and sixty feet wide. Its hold is twenty feet deep and is divided into hatches which contain twelve thousand tons of iron ore. The engines are at the stern and they move the ship onward by a screw propeller, which whirls around at the rate of ninety revolutions a minute.

The vessel makes the round trip from the head of Lake Superior to the ports of Lake Erie and return, a distance of almost two thousand miles, in about one week; and it goes onward so steadily that we hardly know we are steaming. We leave Duluth in the morning and are soon out of sight of land. We are on Lake Superior, the largest freshwater lake of the world, its only rival in size being Lake Victoria in Central Africa.

It.is four hundred and twenty miles from Duluth to the ''Soo," where we are to make our twenty-foot jump

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