Typed on back of image: "The acid house, so called, as the [DuPont] Company at one time made acid. Afterwards, this building was used for storing and pulverizing nitrate of soda later another building was erected for this purpose in another section...
Typed caption: "This was an additional coal house for burning charcoal built in the late 1880s in the upper end of the Eleutherian Works and located on the switch which ran into the works from Montchanin on the Wilmington and Northern RR, now part...
