Stanley Matthews, Sutter v. Robinson — Opinion of the Court
“ The making of the vessel, C, of wood, and sufficiently porous to permit the steam to percolate through it, constitutes the essential feature of this invention. When metallic vessels are employed to receive the tobacco, it is liable to be and in such cases is merely heated, but not subjected to the moistening influence of steam or vapor percolating through the vessel containing the tobacco, as when this vessel is made of wood sufficiently porous to admit of that result. ”
