The seed hairs of the typha family (cat-tails) are easy to collect and appear to the eye to consist of cellulosic fibers of nearly uniform length radiating from a central stem. The object of the present Thesis was to review…

Fluid flow has been measured through almost every type of porous material. A considerable portion of these permeability studies has been directed towards the flow of gases through a bed of charcoal grains. The interest in gas flow through charcoal…