How does a triple-expansion engine differ from an ordinary steam-engine?
Cargoes are carried by water across Europe from Havre to Marseilles, and from The Hague to the mouth of the Danube; illustrate the route on a map of Europe.
The following instruction occasionally is found in the pilothouse of a vessel—what is its meaning?
"Green to green and red to red—
Perfect safety; go ahead."
From the chart on [p. 49] show how a pilot uses the range lights in entering New York Harbor.
The new freighter Minnesota is designed to carry a load of 30,000 tons; how many trains of fifty cars, each car holding 30,000 pounds, are required to furnish her cargo?
From the map on [pp. x-xi] describe the new ocean routes that will be created by an interoceanic canal across the American continent.
FOR COLLATERAL REFERENCE
Photographs or illustrations of various steam and sailing craft.
An Atlantic Coast Pilot Chart—any month.