Foundations of geometry different sets of axioms for Euclidean geometry, any of these can replace the Euclidean parallel postulate. The following partial list indicates some of these theorems that are of historical interest. Absolute geometry is a geometry based on an axiom system consisting of all the axioms giving Euclidean geometry except for the parallel postulate or any of its alternatives. The term was introduced by János Bolyai in 1832. It is sometimes referred to as neutral geometry, as it is neutral with respect to the parallel postulate. In Euclid's "Elements", the first 28 propositions and Proposition I.31 avoid using the parallel postulate,
In the Reign of Terror: The Adventures of a Westminster Boy In the Reign of Terror: The Adventures of a Westminster Boy In the Reign of Terror: The Adventures of a Westminster Boy is a novel by G. A. Henty published in 1888. The novel follows the adventures of Harry Sandwith, an English boy sent to live with the Marquis de St. Caux during the height of the French Revolution. Harry Sandwith, a sixteen-year-old English boy, is sent to live in France with the Marquis de St. Caux, a friend of a French nobleman Harry's father once served. The marquis is impressed with the English system of schooling and believes that