Undated but probably March 1937. This view shows the asphalt mixer scales, asphalt bucket, etcx85 used in weighting and mixing the concrete for the manufacture of the reinforced concrete sewer tile. All aggregates were heated in the dryer, screened into bins, and batched by weight. The water was also weighed in the asphalt bucket with the dial scales in the foreground. See also mcalA17F02i10