The great merchant flour mills of Baltimore and Rochester fell into this category, as did some of the large packing plants in New York, Philadelphia, Baltimore, and (after 1840) Cincinnati.

• 巴尔的摩和罗彻斯特的大型商业化面粉厂即属于此列，纽约、费城、巴尔的摩以及（1840年后）辛辛那提的一些大型包装厂也是如此。