This was a serious problem as most iron used during the 17th and 18th century was bar or wrought iron.
यह एक गंभीर समस्या थी क्योंकि 17 वीं और 18 वीं सदी के दौरान प्रयुक्त लौह ढलवां लौह या बार आयरन होता था।