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Charles Sanders Peirce

astronomy
Johann Daniel Titius and the Titius-Bode Law

Johann Daniel Titius and the Titius-Bode Law

Tabea Tietz
On January 2, 1729, German astronomer Johann Daniel Titius was born. He is best known for formulating the Titius–Bode law, a hypothesis that the bodies in some orbital systems, including the Sun’s, orbit at semi-major axes in a function of planetary sequence. The formula suggests that, extending outward, each planet would be approximately twice as far from the Sun as the one before. The hypothesis correctly anticipated the orbits of Ceres and Uranus,…
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women in science
Christine Ladd-Franklin and the Theory of Colour Vision

Christine Ladd-Franklin and the Theory of Colour Vision

Tabea Tietz
On December 1, 1847, American psychologist, logician, and mathematician Christine Ladd-Franklin was born. She is known for contributions to the theory of color vision accounting for the development of man’s color sense which countered the established views of Helmholtz, Young, and Hering. Her position was that color-sense developed in stages. Christine Ladd-Franklin – Early Years Christine Ladd was born in Windsor, Connecticut, to Eliphalet Ladd, a merchant, and Augusta Niles Ladd. She began…
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philosophy
Ferdinand de Saussure and the Study of Language

Ferdinand de Saussure and the Study of Language

Harald Sack
On November 26, 1857, Swiss linguist and semiotician Ferdinand de Saussure was born. His ideas laid the foundation for many significant developments both in linguistics and semiotics in the 20th century. Moreover, de Saussure is widely considered one of the fathers of 20th-century linguistics and together with Charles Sanders Peirceone of two major fathers of semiotics.[4] “Il est souvent plus aisé de découvrir une vérité que de lui assigner la place qui lui…
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