Columbian Press Small 310×320 Medium 619×640 Large 991×1024 Download Tiff Original 2322×2400 | (1.9 MB) Description George Clymer improved upon Gutenberg's press by making it out of iron therefore reducing the force required. Keywords Columbian press, George Clymer, invention, iron, manufacturing, media, printing, printing press Galleries Printing and Paper Industries Source: Hill, Henry Chase The Wonder Book of Knowledge (Philadelphia, PA: John C. Winston Company, 1921)
