
Advance
Tannery Mill
With the use of new chemicals and more efficient production methods, our Leather production will be unrivaled.
Cupola SmeltingAdvancerequiresAdvance tree
Requires 1
Cupola SmeltingRevolutionsRequires
Belongs to 1
RevolutionsAge
Required by 1
Naval Supplies MillRevolutionsRequires
research_cost = -0.75
