Hydraulic Ram, 19Th Century. From Cyclopaedia Of Useful Arts And Manufactures By Charles Tomlinson. PosterPrint - Item # VARDPI1958535 - 17 x 12 is inches in size and this Poster Print would make the perfect addition to your home or office or gift recipient. This Poster Print is ready for hanging or framing and ships in an oversized tube for maximum protection.