- circa 1930
General view of employee Al Woodward preparing polished plates for a corrosion test at the Dearborn Chemical Company's 35th Street laboratory facility and manufacturing plant. Founded in 1887, the Dearborn Chemical…
This advertisement describes a use case for Beckman pH meters in which Macon Water Works used the instruments to control the acidity of the water and inhibit corrosion of pipes.
Arnold Beckman invented his first pH…