Mission Mill (and Millstone)
Mills were used to grind grain such as corn or wheat into meal or flour for use as food. The grain was poured into the hopper which funneled it through the eye in the top millstone. Water drove the waterwheel which turned the top millstone. The top millstone (runner) turned against the stationary bottom millstone (bedstone) and ground the grain into meal or flour. Millers were able to adjust the distance between the runner and the bedstone to adjust the courseness
Courtesy hmdb.org
