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In -e.er verbs other than most -eler and -eter verbs, the e becomes an è before endings that start with a silent e (including the future and conditional endings). For example: peler (to peel) -> je p-èle (present) / je p-èlerai (futur) / je p-èlerais (conditional).
French verbs have a large number of simple (one-word) forms. These are composed of two distinct parts: the stem (or root, or radix), which indicates which verb it is, and the ending (inflection), which indicates the verb's tense (imperfect, present, future etc.) and mood and its subject's person (I, you, he/she etc.) and number, though many endings can correspond to multiple tense-mood-subject ...
Aside from être and avoir (considered categories unto themselves), French verbs are traditionally [1] grouped into three conjugation classes (groupes): . The first conjugation class consists of all verbs with infinitives ending in -er, except for the irregular verb aller and (by some accounts) the irregular verbs envoyer and renvoyer; [2] the verbs in this conjugation, which together ...
The "Paris meridian arc" or "French meridian arc" (French: la Méridienne de France) is the name of the meridian arc measured along the Paris meridian. [1] The French meridian arc was important for French cartography, since the triangulations of France began with the measurement of the French meridian arc. Moreover, the French meridian arc was ...
Later arc measurements aimed at determining the flattening of the Earth ellipsoid by measuring at different geographic latitudes. The first of these was the French Geodesic Mission, commissioned by the French Academy of Sciences in 1735–1738, involving measurement expeditions to Lapland (Maupertuis et al.) and Peru (Pierre Bouguer et al.).
In 1791, the French Academy of Sciences chose to define the metre as one ten-millionth of the distance from the equator to the North or South Pole. This replaced the earlier definition based on the period of a pendulum, because the force of Earth's gravity varies slightly over the surface of the Earth, which affects the period of a pendulum. [1]
In geodesy and navigation, a meridian arc is the curve between two points near the Earth's surface having the same longitude. The term may refer either to a segment of the meridian, or to its length. Both the practical determination of meridian arcs (employing measuring instruments in field campaigns) as well as its theoretical calculation ...
Appearance depends on reference parallel, but cordiform in all but the limiting case. General case of both Werner and sinusoidal. 2003 Bottomley: Pseudoconical Equal-area Henry Bottomley: Alternative to the Bonne projection with simpler overall shape. Parallels are elliptical arcs Appearance depends on reference parallel. c. 1820: American ...