when was the scrub board invented
Evidence of ancient washing soap was found at Sapo Hill in Rome, where the ashes containing the fat of sacrificial animals was used as a soap. The earliest washing machine was the scrub board invented in 1797. American, James King patented the first washing machine to use a drum in 1851, the drum made King's machine resemble a modern machine, however it was still hand powered. In 1858, Hamilton Smith patented the rotary washing machine.