Physical description

Five copies of a letter from ? Smith, Engineer Way & Structures, of the Kansas City Public Service Company to Paul A. Douden & Co., dated November 15, 1937. He tells of their experiences with Scalebuoys. He mentions reduction of scale and about a 30% reduction in the consumption of soap and the chemicals used in the water for cleaning purposes. In the bottom left corner is a small picture of a bus and a tram.