1979 Interior view, 3rd floor, detail of Minneapolis Centrifugal Reel, resting on top of Allis reel.

1979 Interior view, 3rd floor, detail of Eureka horizontal Wheat Scourer.

1979 Interior view, 3rd floor, detail of H.H. Barnard Dustlesss Wheat separator and oat and weed Extractor #1.