Paul Hay du Chastelet - AbsoluteAstronomy.com

Paul Hay du Chastelet was a French magistrate, orator and writer. His brother Daniel Hay du Chastelet de Chambon

Daniel Hay du Chastelet de Chambon

Daniel Hay du Chastelet was a French clergyman and mathematician. His brother Paul Hay du Chastelet was also a writer....

was a mathematician.

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