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Gnomon Chronicles is a work of fiction and nonfiction by Karl Jones.
On This Day in History: September 27
1677: Mathematician, astronomer, and cartographer Johann Gabriel Doppelmayr born. He will publish works on mathematics and astronomy, including sundials, spherical trigonometry, and celestial maps and globes, along with biographical information on several hundred mathematicians and instrument makers.
1737: Physician, mathematician, and engineer Hubert Gautier dies. He authored the first book on bridge building, Traité des Ponts, in 1716, as well as books on roads, fortifications, antiquities, geology, and a first manual for watercolor practitioners.
1783: Mathematician Étienne Bézout dies. His Théorie générale des équations algébriques contained much new and valuable matter on the theory of elimination and symmetrical functions of the roots of an equation.
1879: Mathematician and philosopher Hans Hahn born. He will make contributions to functional analysis, topology, set theory, the calculus of variations, real analysis, and order theory.
1905: The physics journal Annalen der Physik received Albert Einstein's paper, "Does the Inertia of a Body Depend Upon Its Energy Content?", introducing the equation E=mc².
1928: Mathematician and academic Hans F. Weinberger born. He will contribute to variational methods for eigenvalue problems, partial differential equations, and fluid dynamics.
1962: Rachel Carson's book Silent Spring is published, inspiring an environmental movement and the creation of the U.S. Environmental Protection Agency.
Permalink: September 27
I Ching reading for June 28, 2019
The present is embodied in Hexagram 11 - T'ai (Peace): We see the lesser gone and greatness come upon us. There will be good fortune, with progress and success.
The second line, undivided, shows one who can bear with the uncultivated, cross the Ho without a boat, not forget the distant, and have no selfish friendships. Thus does he prove himself acting in accordance with the course of the due Mean.
The situation is evolving slowly, and Yin (the passive feminine force) is gaining ground.
The future is embodied in Hexagram 36 - Ming I (Darkening of the Light): It will be advantageous to realize the difficulty of the position, and maintain firm correctness.
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