FLUE

In Architecture, the long open tube of a chimney from the fireplace to the top of the shaft for voidance of the smoke. FLUENT or FLOWING QUANTITY, in Analysis, is the variable quantity, considered as increasing or diminishing. The term denotes the same thing as integral, which is now universally used in its stead, the differential and integral calculus having superseded the methods of fluxions and fluents. See Fluxion, Integral. FLUID, or FLUID BODY, is that whose parts yield to the smallest pre ure, and are moved among each other without any sensible resistance. Some writers distinguish between fluid and li(juid, confining the laiter term to those substances which wet, or whose particles adhere to other bodies plimged into them. Thus air, ether, mercury, water, alcohol, . are all fluids; but water and alcohol are also liquids, because they wet other [s. 470]