Samuel Blatchford

“ The ridge-stone of the Billaud tomb is a small cap-stone, which bound the roof-stones together, and which covered the joint made by their edges. The cap-stone of the patent is a larger and wider ridge-stone than that of Billaud, and, by its great weight, is more efficient in holding the structure together.' We concur with the circuit court in its views. Where the roof-stones are wider, as in the Billaud roof, there need be only a narrow ridge-stone, while where the roof-stones are narrower, as in the patented device, a wider ridge-stone or cap-stone is necessary. ”

“ This stone, C, is in practice of great weight, which weight tends entirely to hold the structure together, and, there being no vertical joints to spread open, there can be no disruption or displacement by ordinary means. The space at the sides, between the stones, A, is filled out by stones, c, set upon the side walls. The roof at each side of the cap-stone is to be formed of one or more roof-stones, B, each being continuous from one gable-stone to the other, and locked, as described. The roof may also be made flat, curved, or inclined. ”