Development and production of the Helipot (helical potentiometer) and the quartz (Model DU) spectrophotometer. Establishes National Technical Laboratories while still a member of the Caltech faculty; ...

But state-of-the-art ultraviolet and visible (UV-vis) spectrophotometry, which measures electronic transitions of a wide range of molecules as they absorb light, was cumbersome and expensive. In July ...