Olinto De Pretto – Ahead of His Time

Olinto De Pretto was born on October 28, 1857, in Vicenza, Italy, into a family of wealthy landowners. He grew up in a time of significant social and political changes in Italy, including the unification of the country and the shift towards a more industrialized economy. De Pretto showed a talent for mathematics and physics from an early age, and he pursued these subjects at the University of Padua, where he earned a degree in engineering.

After completing his studies, De Pretto worked as a professor of mathematics and physics at various institutions in Italy. He was a prolific author of scientific papers, covering a range of topics from thermodynamics and elasticity to algebra and geometry. He also served as a consultant to several companies in the energy and transportation sectors.

De Pretto’s most significant contribution to science was his work on mass-energy equivalence. In a paper published in 1903, he derived a formula that was similar to Einstein’s famous equation E=mc², which relates the amount of energy in a system to its mass, and was published two years later in 1905.

Although Einstein’s work is now more widely recognized, De Pretto’s contribution remains significant because it demonstrates that the idea of mass-energy equivalence was being explored by other scientists at the same time that Einstein was developing his theory.

Here’s an interesting discussion about this topic on Quora, for those interested:


While it is unclear whether Einstein was directly influenced by De Pretto’s work, there is evidence that Einstein had access to De Pretto’s paper and may have been aware of his ideas. In any case, De Pretto’s work on mass-energy equivalence remains an important precursor to Einstein’s theory of special relativity.

Outside of his scientific work, De Pretto was also an active member of his local community. He was involved in several charitable organizations and worked to promote social and economic development in the Vicenza region. De Pretto died on April 7, 1921, at the age of 63, but his contributions to science continue to be recognized and celebrated today.

2 thoughts on “Olinto De Pretto – Ahead of His Time”

  1. Excellent Article!
    Thank, You.
    Russian Physicist Nikolay A. Umov was the first scientist to derive and put forth a formula to illustrate the energy-mass relationship: E=kmc^2 in 1873.
    Albert Einstein only describes: m = L / V^2 (German language version) in his original paper: “Does the Inertia of a Body Depend on its Energy Content?” written 27 Sep 1905, published 21 Nov 1905 in German science journal “Annalen der Physik” vol 18 pp 639–642 : “If a body gives off the energy L in the form of radiation, its mass diminishes by L / V^ 2. The fact that the energy withdrawn from the body becomes energy of radiation evidently makes no difference, so that we are led to the more general conclusion that the mass of a body is a measure of its energy-content; if the energy changes by L , the mass changes in the same sense by L / 9×10^ 20.”
    In the later “English” version the translators took the liberty of replacing the original “V^2” with “c^2”. Einstein did not write E=mc2 until years later.


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