11. On a new form of lantern-galvanometer Author(s): Mayer, Alfred M. (Alfred Marshall), 1836-1897, author Publication: [New Haven?] : [publisher not identified], [1872] Subject(s): Magnetics -- instrumentationElectricityEquipment Design
12. A home-made spinal apparatus Author(s): Taylor, Charles Fayette, 1827-1899, author Publication: [New York] : D. Appleton & Co., [1886] Subject(s): Spinal Diseases -- therapyBracesEquipment DesignPaper