It is always advisable to use stones to the French grinding pass, because the same time a much larger and better paper yield significant than the stones. The sharpening of blunt overflowed blocks is a job that requires lots of practice. The figure shows the combination of two pairs of stones in the construction of Ransomes, Sims & Head, as such, is widely used in English economies and crushing in application. Most of the factories of agricultural machinery in Germany fabricate trransportable millstones in good form.