There is not only no free state which would now establish it, but there is no slave state, which, if it had had the free alternative as we now have, would have founded slavery.
Bio: Vannoccio Biringuccio, sometimes spelt Vannocio Biringuccio, was an Italian metallurgist. He is best known for his manual on metalworking, De la pirotechnia, published posthumously in 1540.
