the blast furnace now included two smaller furnaces or cupolas in addition to the main furnace, all of which were housed in a large casting shed and adjoined by an office, bridgehouse and wheelhouse (the latter containing a large waterwheel to pump air into the furnace). the cupolas were added for the production of cast-iron products, which allaire was able to manufacture as a result of the surplus pig iron from the works. his company manufactured items including pots, pans, skillets, kettles and other holloware; along with andirons, pipes, tools and machine castings. some of these items were sold at the company store, but most were shipped north for sale in new york. allaire established file and screw factories, the latter of which manufactured the first screws made on mechanical lathes.