11,1935 View of the excavation for the collector tunnel taken from the west. The soil-sifting mechanism is visible. Steel work is being set up for the collector tank in the background. Oct. 11, 1935. Close view of several of the cells.
Graduated rods are six feet long.
June 12, 1936. Spraying paint on the large lysimeter walls. A seepage plate is shown on the right. Sept. 15, 1936. Lysimeter tunnel, looking towards the west entrance.