This is due to the absence of pitch and the porosity of the wood.
The porosity of some of the rocks can here be readily distinguished.
It dissolves the cantharidin, and at the same time gives to the collodion film the essential property of porosity.
So in St Johns wort, we may take notice of the form of the leaves and flowers, the porosity of the leaves, the Veins.
Moosehide at best is not water repellent and is good for dry trails and dry snow work because of its porosity.
Compressibility and Expansibility, sometimes mentioned as "properties," are but results of porosity.
This membrane possesses a certain degree of porosity, which is probably increased by dilatation.
A certain degree of porosity in the original rock is also known to favor the alteration.
The residuary mass should not be heated red hot, so as not to impair its porosity or its ready affinity for carbonic acid.
This is the case of wine in casks, the porosity of the wood allowing the very gradual permeation of the air.
late 14c., from Old French porosité, from Medieval Latin porositas, from porus (see pore (n.)).
porosity po·ros·i·ty (pə-rŏs'ĭ-tē, pô-)
n.
The state or property of being porous.
A structure or part that is porous.
A cavity or perforation.
