How the Mill Works | Peirce Mill – Rock Creek Park ...
There are three pairs of millstones at Pierce Mill, one of which is currently in operation. The massive stones weigh 2,400 pounds each. One pair, made of quartz and imported from France, was intended for grinding wheat into fine flour; it was purchased for the mill in 1880 for 75 dollars. The stones for grinding corn are made of local granite.
![](/image/whatsappp.png)