FERROCYANIDE n.
nds, and the basis of the ferric ferrocyanate, prussian blue. It is obtained by strongly heating together potash, scrap iron, and animal matter containing nitrogen, as horn, leather, blood, etc., in iron pots.
FIRE n.
boiler which are exposed to the direct heat of the fuel and the products of combustion; heating surface. -- Fire swab, a swab saturated with water, for cooling a gun in action and clearing away particles of powder, etc. Farrow. -- Fire teaser, in England, the fireman of a steam emgine. -- Fire water, ardent spirits…
FLUORESCEIN n.
A yellowish red, crystalline substance, C20H12O5, produced by heating together phthalic anhydride and resorcin; -- so called, from the very brilliant yellowish green fluorescence of its alkaline solutions. It has acid properties, and its salts of the alkalies are known to the trade under the name of uranin.…