Theodore William Richards

He married Miriam Stuart Thayer, daughter of a Harvard Professor, Joseph Henry Thayer, on May 28, 1896. The couple lived in a house near the Harvard College yard built with the financial assistance of Richards’ father.

He became a father for the first time on February 1, 1889, with the birth of his daughter, Grace. He also fathered two sons, William Theodore and Greenough Thayer, both of whom became professors. William taught Chemistry at Princeton University whereas Greenough was an architect who taught design at Virginia Polytechnic Institute.

Richards apparently suffered from chronic respiratory problems and was also plagued by depression. He died on April 2, 1928, in Cambridge, Massachusetts at the age of 60.

Born on January 31, 1868, in Germantown, Pennsylvania, Theodore William Richards was the third son and fifth child of William Trost Richards and Anna Matlack. His parents were highly gifted; his father being a noted seascape painter and his mother, a Quaker poet and author.

At the age of 6 he met Josiah Parsons Cooke, Jr., the Chemistry professor at Harvard University, during a vacation on Rhode Island. Cooke piqued the young boy’s interest in science by showing him the rings of Saturn through a telescope.

He received his elementary and secondary schooling at home because his mother felt that public education was aimed at the slowest student in the class. He was taught reading, writing, arithmetic, geography, history, music, and drawing by his mother till he joined Haverford College at the age of 14 in 1883.

Two years later, in 1885, he graduated from Haverford College at the top of the class with a degree in Chemistry. After his graduation, he enrolled in the senior class at Harvard for the fall semester. Despite being the youngest student in the class, he graduated with the highest honors in 1886 and received his Bachelor of Arts degree.

At the age of 20, in 1888, he obtained his doctorate in Chemistry. The topic of his dissertation was the determination of the atomic weight of oxygen relative to hydrogen which earned him the Parker fellowship.

Richards’ work began with his dissertation in 1888 where he studied on the atomic weights of oxygen and hydrogen. He conducted independent research and published papers on the atomic weights of oxygen, copper and silver and studied the heat produced by the reaction of silver nitrate with solutions of metallic chlorides.

After his return from Germany, Richards became an Assistant in Chemistry (quantitative analysis) at Harvard. He was appointed an instructor in 1891 and became an assistant professor in 1894.

In 1885, his mentor Cooke passed away and he was sent to visit labs in Leipzig and Göttingen to improve his qualifications to teach physical chemistry. It was then that his interest in thermochemistry and electrochemistry began to take shape.

He was offered the chair of physical chemistry at the University of Göttingen. Unwilling to part with a talent such as Richards, Harvard promoted him to a full professor in 1901.

In 1902, he was part of a study that was investigating the behavior of galvanic cells at low temperatures which led to the discovery, by Walther Nernst, of the “Nernst heat theorem” and the “Third law of thermodynamics” in 1906.

During his life, he authored nearly 300 papers on atomic weights. He also published 2 books - the non-fiction ‘Determinations of Atomic Weights’ in 1910 and a biography, ‘The Scientific Work of Morris Loeb’ in 1913.

His best-known studies dealt with the atomic weights of elements, which constituted about half of his scientific research. He is credited with determining the atomic weight of over 25 elements, with the highest accuracy. His research also led to the invention of the adiabatic calorimeter and the nephelometer.