I Live in Pittsburgh. Regardless of Its current accomplishments or future direction, Pittsburgh will always be know for its industrial past. Even now, there are signs of this past everywhere — giant machines stand as silent monuments to their proud history. Rows of smoke stacks remind new developments of their sooty past. Everywhere you look there are reminders — many of the buildings are gone, but we all recall what stood in the now open spaces.

At one time, the steel mills were everywhere here; then they were gone. As they folded, there was a wealth of buildings and objects abandoned. These forms are some such objects. At one time there were shops at every mill that produced these forms and prototypes. They were used to create the molds into which steel was pored.

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http://smallspaceliving.blogspot.com/2008/03/mold-forms-found-object-decorating.html