1. Report on the patents and processes in the manufacture of the American building block Author(s): Horsford, Eben Norton, 1818-1893, author Publication: New York : Printed by S. Booth, 1868 Subject(s): Construction MaterialsPatents as Topic
2. Patent concrete stone, F. Ransome, Esq., C.E., London, for building purposes: bridges, gate ways, mantles, vases, tiles, grave stones and every variety of ornamental work Author(s): Ransome, F. (Frederick), 1818-1893 Publication: Baltimore : Lucas & Sons, Printers, 1866 Subject(s): Construction Materials