Original oil and gas trade magazine vintage ad for MINNEAPOLIS-HONEYWELL REGULATOR COMPANY of Philadelphia, PA. Low-cost Computers to the Rescue. Single function analog computers take the high cost out of solving process equations, such as mass rate of flow, BTU rate, internal reflux, and many others. Prices as low as 1485.00. The Honeywell Fractionator Reflux Computer minimizes oscillations and keeps products on spec. This unique 1962 old industrial equipment magazine advertisement would display beautifully matted and framed. Two page gatefold advertisement.