FELDSPAR; FELDSPATH n.
inerals, 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 or…
FERRICYANIDE n.
s of ferric iron and some other base. Potassium ferricyanide (Chem.), red prussiate of potash; a dark, red, crystalline salt, K6(CN)12Fe2, consisting of the double cyanide of potassium and ferric iron. From it is derived the ferrous ferricyanate, Turnbull's blue.
FERROCYANIDE n.
ferrous iron and some other base. Potassium ferrocyanide (Chem.), yellow prussiate of potash; a tough, yellow, crystalline salt, K4(CN)6Fe, the starting point in the manufacture of almost all cyanogen compounds, and the basis of the ferric ferrocyanate, prussian blue. It is obtained by strongly heating together potash…
FIGURE v.
by a figure, as to form or mold; to make an image of, either palpable or ideal; also, to fashion into a determinate form; to shape. If love, alas! be pain I bear, No thought can figure, and no tongue declare.Prior.
FIXED a.
c acid, under Carbonic. -- Fixed alkali (Old Chem.), a non-volatile base, as soda, or potash, in distinction from the volatile alkali ammonia. -- Fixed ammunition (Mil.), a projectile and powder inclosed together in a case ready for loading. -- Fixed battery (Mil.), a battery which contains heavy guns and mortars in…