FIRE n.
pblack, etc., the 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…
FORCE n.
exerted by living structures on adjoining cells, by which the latter are developed in harmony with the primary structures. -- Centrifugal force, Centripetal force, Coercive force, etc. See under Centrifugal, Centripetal, etc. -- Composition of forces, Correlation of forces, etc. See under Composition, Correlation, et…
FRICTION n.
. -- Friction powder, Friction composition, a composition of chlorate of potassium, antimony, sulphide, etc, which readily ignites by friction. -- Friction primer, Friction tube, a tube used for firing cannon by means of the friction of a roughened wire in the friction powder or composition with which the tube is fil…