Hele-Shaiv & Hay. 
Phil. Trans., A., Vol. 195 , Plate 18 . 
Infinite Cylinder of Square Section. 
Permeability = 100. 
■26 
Infinite Cylinder of Square Section. 
Permeability =100. 
Infinite Cylinder of Rectangular Section. 
Permeability = 100. 
Infinite Cylinder of Rectangular Section. 
Permeability = 100. 
