Clark, William Mansfield

Clark, W. Mansfield. The Determination of Hydrogen Ions. The Williams Wilkins Company, Baltimore. 1928. 

Questions were quickly raised about whether lead, long known as a poison, was safe to use in fuel. William Mansfield Clark, the head of the Chemistry Division in what would soon become the National Institute of Health, wrote to the Assistant Surgeon General in October 1922 to warn of a serious menace to the public health. Clark was a distinguished scientist who had pioneered the measurement and control of pH in biochemistry. The Public Health Service s response to this warning was that research was needed, but experiments would take time. It was decided to contact General Motors first.11... 

Prior to the development of the glass electrode and pH meter, the color indicator application found a wide use for the direct determination of hydrogen-ion concentration. William Mansfield Clark (De Lamur Professor Emeritus of Physiological Chemistry at Johns Hopkins University) spent most of his lifetime investigating organic substances suitable for acid-base indicators. He never accepted the pH meter. In his classic book Oxidation-Reduction Potential of Organic Systems he stated ( ) ... 

W. Mansfield Clark, Oxidation-Reduction Potentials of Organic Systems, The Williams and Wilkins Co. (1960). 

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