To-day oil can be brought at a small expense from west of the Mississippi River to the Atlantic seaboard, refined, and distributed throughout that part of the country, or loaded into "tankers,"-that is, steamships containing strong tanks of steel,-and so taken across the ocean.
"Diggers in the Earth"
Eva March Tappan
The German U-boats were making a particularly successful drive at tankers with the result that England had the utmost difficulty in supplying her fleet with this kind of fuel.
"The Victory At Sea"
William Sowden Sims Burton J. Hendrick
How they could move at all was a problem: some were propelled by wheels like water wheels, only the motive power was men who worked a perpetual tread-mill; the majority were inhabited by a large river population called the tankers, who ages before had taken up their abode on boats when driven by nature or man from land.
"Fifty-One Years of Victorian Life"
Margaret Elizabeth Leigh Child-Villiers, Countess of Jersey