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the several quantities to be added to, or taken from, its position as calculated on the hypothesis of a mean uniform motion, in order to find its true position as resulting from its actual and unequal motion. Absolute equation. See under Absolute. -- Equation box, or Equational box, a system of differential gearing us…

Potential energy; negative value of the force function.

Pertaining to the hypothetical upper, purer air, or to the higher regions beyond the earth or beyond the atmosphere; celestial; as, ethereal space; ethereal regions. Go, heavenly guest, ethereal messenger. Milton.

Any compound of ethyl of a binary type; as, potassium ethide.

acement of the hydroxyl hydrogen, after the manner of a hydrate; an ethyl alcoholate; as, potassium ethylate, C2H5.O.K.

A yellow or greenish yellow gas, first prepared by Davy, evolved from potassium chlorate and hydrochloric acid. It is supposed to consist of chlorine tetroxide with some free chlorine.

wer, the lowest card used being the seven, or frequently, in two-handed euchre, the nine spot. See Bower.

dinary; uncommon; rare; hence, better than the average; superior. Lyell. This particular spot had exceptional advantages. Jowett (Th. ) -- Ex*cep"tion*al*ly(#), adv.

i; l Anterior Aqueous Chamber; m Crystalline Lens; n Vitreous Humor; o Retina; p Yellow spot; q Center of blind spot; r Artery of Retina in center of the Optic Nerve.

Groups of small shining spots on the surface of the sun which are brighter than the other parts of the photosphere. They are generally seen in the neighborhood of the dark spots, and are supposed to be elevated portions of the photosphere. Newcomb.

Free from spots, specks, dirt, or imperfection; unblemished; clean; pure. A fair white linen cloth. Book of Common Prayer.

The state of being fair, or free form spots or stains, as of the skin; honesty, as of dealing; candor, as of an argument, etc.

land is rendered mellow and clean from weeds, by cultivating some green crop, as turnips, potatoes, etc. [Eng.]

species of deer (Cervus dama), much smaller than the red deer. In summer both sexes are spotted with white. It is common in England, where it is often domesticated in the parks.

cies of Sabal and Thrinax in the West Indies, Florida, etc.; and especially the great talipot tree (Corypha umbraculifera) of Ceylon and Malaya. The leaves of the latter are often eighteen feet long and fourteen wide, and are used for umbrellas, tents, and roofs. When cut up, they are used for books and manuscripts.…

f minerals, closely related in crystalline form, and all silicates of alumina with either potash, soda, lime, or, in one case, baryta. They occur in crystals and crystalline masses, vitreous in luster, and breaking rather easily in two directions at right angles to each other, or nearly so. The colors are usually white…

Having transparent spots, as the wings of certain butterflies.

iculum dulce). It is a smaller and stouter plant than the common fennel, and is used as a pot herb. -- Dog's fennel (Anthemis Cotula), a foul-smelling European weed; -- called also mayweed. -- Fennel flower (Bot.), an herb (Nigella) of the Buttercup family, having leaves finely divided, like those of the fennel. N.Da…

A form of conductor, designed by Ferranti, for currents of high potential, and consisting of concentric tubes of copper separated by an insulating material composed of paper saturated with black mineral wax.

nide. Ferricyanic acid (Chem.), a brown crystalline substance, H6(CN)12Fe2, obtained from potassium ferricyanide, and regarded as the type of the ferricyanides; -- called also hydro-ferricyanic acid, hydrogen ferricyanide, etc.