So Much History

Elmer Samuel Imes

His landmark contributions to the world of physics made Elmer Imes one of the most respected and recognized scientist of his day. Elmer Samuel Imes was born in Memphis, TN, on October 12, 1883. Both of his parents were alumni of Oberlin College in Ohio, where they met. Their parents became home missionaries in the Congregational Church with the American Missionary Association and moved to the South to serve freedmen and their children. Elmer Imes and his brothers attended grammar school in Oberlin, Ohio. From 1895 to 1899, Elmer attended and completed his high school education at the Agricultural and Mechanical High School in Normal, Alabama, and set his sights on higher education.

Elmer Imes enrolled at Fisk University and in 1903 he graduated with a bachelor’s degree in general science. When Imes entered Fisk around 1899, Fisk was a relatively new institution of higher learning. Despite its youth, Fisk offered Imes a classical education superior to what was available to most African Americans at the time. Upon graduating from Fisk, he accepted a job teaching physics and mathematics at Albany State University in Albany, Georgia and the Emerson Institute in Mobile, Alabama. In 1910, Imes returned to Fisk to teach and earned his master’s degree there in science in 1915.

With a strong inclination for research, he enrolled at the University of Michigan for additional study in physics, where he was accepted for probationary study. During the late 19th and early 20th centuries, it was common for northern universities to require Black students graduating from Black colleges to repeat the last year of the university’s undergraduate program. They felt they could not objectively measure the students’ qualifications. However, Black students generally performed extremely well and after receiving their advance degrees were very successful in their careers. That was certainly the case with Elmer Imes.

After a year at Michigan he was chosen as a graduate fellow, a position he continued in until 1918, when he completed his doctorate in physics. Imes was the second African American to receive a Ph.D. in physics, and the first to do significant research work, since Edward Bouchet graduated from Yale University in 1876. Imes was also one of the first African Americans to be initiated into Sigma Xi, a scientific honor society, and to be listed in American Men of Science. While at the University of Michigan, Imes' research and doctoral thesis opened up an entirely new field of research, the study of molecular structure though use of a high resolution infrared spectrometer.

Under the direction of Harrison Randall, Imes’s landmark work in physics included conducting the first high-precision experiments measuring the IR spectrum of three diatomic molecules, hydrogen chloride (HCl), hydrogen bromide (HBr), and hydrogen fluoride (HF). Specifically, his work was one of the earliest applications of high resolution infrared spectroscopy and provided the first detailed spectra of molecules giving way to the study molecular structure through infrared spectroscopy. Imes’ dissertation studied molecular structures through high‐resolution infrared spectroscopy. This work led to him being the first African-American to be published in a physics journal in the United States.

This research thesis titled “Measurements on the Near-Infrared Absorption of Some Diatomic Gases,” was published in November 1919 in the Astrophysical Journal. His dissertation broke new scientific ground, presenting a new form of research, that fundamentally changed quantum theory. It is still regarded as the definitive work in the field. This work was followed by a paper co-authored and presented jointly with Harrison Randall, "The Fine Structure of the Near Infra-Red Absorption Bands of HCI, HBr, and HF" at the American Physical Society and published in the Physical Review in 1920. The research also provided a verification of quantum theory. It became known in Europe as well as in the United States.

Before Imes’ study, some scientists were not certain whether quantum theory applied to the emission spectra of molecules. Imes’ work showed that quantum theory could be applied to the rotational energy states of molecules as well as the vibrational and electronic energy levels. In the years after his dissertation was published, his work was cited extensively in research papers and reviews of literature. Within a short time, his work was also incorporated into textbooks on modern physics. Despite the excellence and impact of his work, as an African American Imes faced limited professional opportunities in most of the U.S during the early 20th century. Black men with higher education simply were not welcome in White institutions.

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