_Elevation_, (of a house,) a plan, representing the upright view of a
house, as a ground-plan shows its appearance on the ground.

_Euclid_, a celebrated mathematician, who was born in Alexandria, in
Egypt, about two hundred and eighty years before Christ. He
distinguished himself by his writings on music and geometry. The most
celebrated of his works, is his 'Elements of Geometry,' which is in use
at the present day. He established a school at Alexandria, which became
so famous, that, from his time to the conquest of Alexandria by the
Saracens, (A. D. 646,) no mathematician was found, who had not studied
at Alexandria. Ptolemy, King of Egypt, was one of his pupils; and it was
to a question of this King, whether there were not a shorter way of
coming at Geometry, than by the study of his Elements, that Euclid made
the celebrated answer, "There is no royal way, or path, to Geometry."

_Equator_, or _equinoctial line_, an imaginary line passing round the
earth, from east to west, and directly under the sun, which always
shines nearly perpendicularly down upon all countries situated near the
equator.

_Evolve_, to throw off, to discharge.

_Exchequer_, a court in England, in which the Chancellor presides, and
where the revenues of, and debts due to, the King are recovered. This
court was originally established by King William, (called 'the
Conqueror,') who died A. D. 1087; and its name is derived from a
checkered cloth, (French _echiquier_, a chess-board, checker-work,) on
the table.

_Excretion_, something discharged from the body, a separation of animal
matters.

_Excrementitious_, consisting of matter excreted from the body;
containing excrements.

_Fahrenheit_, (Gabriel Daniel,) a celebrated natural philosopher, who
was born at Dantzic, A. D. 1686. He made great improvements in the
thermometer; and his name is sometimes used for that instrument.

_Farinaceous_, mealy, tasting like meal.

To _Fell_, to turn down, on the wrong side, the raw edges of a seam,
after it has been stitched, run, or sewed, and then to hem or sew it to
the cloth.

_Festivals_, of the Jews, the three great annual. These were, the Feast
of the Passover, that of Pentecost, and that of Tabernacles; on occasion
of which, all the males of the Nation were required to visit the Temple
at Jerusalem, in whatever part of the Country they might reside. See
Exodus xxiii. 14, 17, xxxiv. 23, Leviticus xxiii. 4, Deuteronomy xvi.
16. The Passover