Rectangular PRISMS of this size were rare in nature.
"Dead Man's Planet"
William Morrison
The axes of the PRISMS are always perpendicular to the cooling surface or surfaces, and in some cases the columns are wonderfully regular.
"Geology"
James Geikie
By the help of peas softened in water, sticks may be joined together, letters, skeletons of cubes, crosses, PRISMS may be built; houses, towers, churches may be constructed, having due breadth as well as length and height, strong enough to be carried about or kept as specimens of ingenuity.
"Dickens As an Educator"
James L. (James Laughlin) Hughes