**(June 14, 1736 – August 23, 1806)**

Charles-Augustin de Coulomb worked in various civil engineering capacities before settling for experimental physics. After serving in Martinique (West Indies) for eight years, he returned to France and began foraging seriously into researches. He explored mechanics before moving on to electricity. Treatises detailing his findings were sent to the Paris Academy of Sciences. Most notable of these are: *The Statistical Problems Applied to Architecture*, and *The Theory of Simple Machines* which won him the academy’s prestigious grand prix. His extensive studies of torsion balance led to the publication of another acclaimed treatise, titled: *The Elasticity of Wires under Twisting Stress*. Having benefitted from the math stalwarts who tutored him as a youth, his application of calculus to complex scientific problems impressed members of the academy. Coulomb would spend the next five years studying electricity, magnetism; and publishing the seven treatises which culminated in the formulation of his famous law: termed the Coulomb’s Inverse-Square Law. Among other things, this law was instrumental to the development of the Theory of Electromagnetism. It not only relates to Newton’s (inverse-square) Law of Universal Gravitation, but could be used to derive Gauss’ Flux Theorem (and vice-versa). In addition to his numerous honors, the S.I. unit of electric charge was designated as the *coulomb* in 1908. He is also the eponym of both the *Coulomb* lunar crater and the *Coulomb-Sarton* pre-Nectarian lunar impact basin. And in Paris, the name Charles-Augustin de Coulomb is among those of the 72 outstanding French achievers emblazoned on the Eiffel Tower.

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The Coulomb S.I. unit is a befitting reward.

Coulomb, Ampere, Faraday, Tesla and Oersted were truly great. The same for Galvani, Volta, etc.

According to the updated S.I. units which began on 20/5/2019, the elementary charge which equals the charge of the proton is 1.60217663 × 10 ‾ ¹⁹ coulombs.

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