glass covered slide with silver mat, red taped edges. Depicts a tank with several hoses at bottom. It reads: "L.A. Bulk Oxygen Installation, Liquid Air, L.A. Oxygen." Recto inscription in pencil, top right: "31."

glass covered slide, silver mat, red tpaed edges. Depicts military tank against treed background. Recto inscription, top right, blue ink: "6." Black tape across lower edgeo f image, between glass.

glass covered slide, silver mat, red tape edges. Depicts a railroad car containing a large silver tank. Car reads "CGBX 652." Recto inscription, top right, "28."