: A photograph of an employee of the Jeffrey Manufacturing Company in Columbus, Ohio, posing beside a mine ventilation fan manufactured by the company.
The Jeffrey Manufacturing Company, also known as the Jeffrey Mining Corporate Center, was established in 1876 as the Lechner Mining Machine Company in Columbus, Ohio by Joseph Jeffrey and Francis Lechner. The company was the number one manufacturer of coal mining machinery worldwide until the mid-twentieth century. View on Ohio Memory.
: AL00927 Subjects
: Mining machinery; Coal mining; Coal mines and mining--Ohio; Coal mines and mining--United States; Inventions; Coal-mining machinery; Manufacturing industries--Ohio; Inventors--Ohio; Ohio Economy--Economy--Labor Places
: Columbus (Ohio)