

A chemist who unlocked the secrets of ozone, revolutionizing organic analysis and marrying into industrial royalty.
Carl Dietrich Harries was a chemist whose work pierced the heart of molecular structure. Born in Luckenwalde, his scientific path led him to the University of Kiel, where he spent over a decade immersed in the reactive world of ozone. His true legacy is ozonolysis, a method he meticulously developed for cleaving carbon-carbon double bonds, which became an indispensable tool for identifying organic compounds. Frustration with academia eventually pulled him away, but not before his research laid foundational stones for future chemical analysis. His personal life intertwined with Germany's industrial narrative through his marriage to Hertha von Siemens, linking theoretical chemistry to a dynasty of practical invention.
1860–1882
Born during or after the Civil War, they built industrial America — the railroads, the steel mills, the first skyscrapers. An era of massive wealth, massive inequality, and the belief that the future belonged to whoever could build it fastest.
Carl was born in 1866, placing them squarely in The Gilded Age. The events that shaped this generation — world wars, depression, and rapid industrialization — shaped the world they entered and the choices available to them.
The biggest hits of 1866
The world at every milestone
First electrical power plant opens in New York
First modern Olympic Games held in Athens
San Francisco earthquake devastates the city
The Battle of the Somme claims over a million casualties
The Great Kanto earthquake devastates Tokyo
He married Hertha von Siemens, daughter of the electrical engineering pioneer Werner von Siemens.
Hertha von Siemens, his wife, was an inventor who created one of the earliest ozone generators.
He left his academic post in 1916, reportedly due to dissatisfaction with university life.
“Ozone cleaves the double bond, revealing the hidden architecture of the molecule.”