Before revision: 300px|Schematic design, published in the New York Times The roller ship , or roller steamer, was an unconventional – and unsuccessful – ship design of the late nineteenth century, which attempted to propel itself by means of large wheels.
After revision: 300px|Schematic design, published in the New York Times The roller ship , or roller steamer, was an unconventional and unsuccessful ship design of the late nineteenth century, which attempted to propel itself by means of large wheels.