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 with silver paper mat, red tape on edges. Image shows sleeping woman in hospital bed, covered with clear plastic tent. Gas tank is beside the bed, with sign that reads in part: "oxygene… attention… defense de fumer." small label recto, top right reads: "23"