| description: | Holt Sidehill Combines With Teams Of 24 To 30 Mules Or Horses On Each Machine Helped Boost Washington Wheat Production From Six Million Bushels In 1890 To 42 Million Bushels In 1920. Ground Drive By A Large Bullwheel And One Man Drove Each Team Of 24 To 30 Mules / Horses. Five Holt Sidehill Combines Seen Here |