The absolute dielectric constant of cellulose fibers

The dielectric constants of cellulose fibers from a number of sources have been measured by a liquid immersion method. The dielectric constant of the fiber is matched exactly to that of the liquid in a dual electrode cell using a null method. The dielectric constant of the liquid is varied by varying the temperature, making use of the large negative temperature coefficient of its dielectric constant as opposed to the small positive temperature coefficient shown by the cellulose fibers.