Physical description

Letter, dated February 17, 1948 from Robert Pagel of the Midwest Extraction Co. Rockford, Ill. To Mr. Frank A. Stevenson. He would like more information on the Scalebuoys and is interested in obtaining two units, a tap unit and a vest pocket unit. He also mentions Dr. Abbotts book and the difficulty of obtaining a price with the variation in foreign exchange. He would also like to know about household units as the water in his country is hard.