_Cuvier, Baron_, the most eminent naturalist of the present age, was born, A. D. 1769, and died, A. D. 1832. He was Professor of Natural History in the College of France, and held various important posts under the French Government, at different times. His works on Natural History are of the greatest value. _Cynosure_, the star near the North Pole, by which sailors steer. It is used, in a figurative sense, as synonymous with _pole-star_, or _guide_. _De Tocqueville_, see _Tocqueville_. _Diamond cement_, a cement sold in the shops, and used for mending broken glass, and similar articles. _Drab_, a thick woollen cloth, of a light brown or dun color. The name is sometimes used for the color itself. _Dredging-box_, a box with holes in the top, used to sift or scatter flour on meat, when roasting. _Drill_, (in husbandry,) to sow grain in rows, drills, or channels; the row of grain so sowed. _Duchess of Orleans_, see _Orleans_. The _East_, and the _Eastern States_, those of the United States situated in the north-east part of the Country, including Maine, New Hampshire, Massachusetts, Rhode Island, Connecticut, and Vermont. _Electuary_, a mixture, consisting of medicinal substances, especially dry powders, combined with honey or sirup, in order to render them less unpleasant to the taste, and more convenient for internal use. _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.