FELDSPAR; FELDSPATH n.
lline 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 nearly white, flesh-red, bluish,…
FERRO-CONCRETE n.
Concrete strengthened by a core or foundation skeleton of iron or steel bars, strips, etc. Floors, columns, piles, water pipes, etc., have been successfully made of it. Called also armored concrete steel, and reënforced concrete.
FINGER n. 11 definitions
r. Busby. Ear finger, the little finger. -- Finger alphabet. See Dactylology. -- Finger bar, the horizontal bar, carrying slotted spikes, or fingers, through which the vibratory knives of mowing and reaping machines play. -- Finger board (Mus.), the part of a stringed instrument against which the fingers press the s…
FIRE n. 21 definitions
e flames of which are colored by various metallic salts, as those of antimony, strontium, barium, etc. -- Fire alarm (a) A signal given on the breaking out of a fire. (b) An apparatus for giving such an alarm. -- Fire annihilator, a machine, device, or preparation to be kept at hand for extinguishing fire by smotheri…