Emission spectrochemical analysis is the oldest technique for performing a chemical analysis without the traditional chemical procedure. Foundations and a section on Spectrochemical Analysis are included in the article.

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Around the time Maurice Hasler was building a spectrograph for use in his then-new Applied Research Laboratories in California, and about a year before Walter Baird started his namesake company just outside of Boston, Richard F. Jarrell was finishing up his four-year degree in Physics at the Massachusetts Institute of Technology. His father, J. O. Jarrell (who disliked and seldom used his given name, Joshua Oscar), had an established business in Boston selling microscopes and other optical goods. The elder Jarrell was taking on a new product line: spectrographs and other analytical instruments from London-based Adam Hilger Limited. He arranged for Dick, his oldest son, to spend the summer at Hilger learning firsthand as much as possible about their instrumentation. That trip, followed by a graduate fellowship project at MIT, set the stage for Jarrell's life in science and business-and for a spectroscopy company that still carries his name.

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