Iowa City, IA: The State Historical Society of Iowa, 1969. Staple-bound Softcover. Very Good. Item #042394
Crisp, clean pages; no owners' marks; saddle staples show light rust but remain secure; cover shows surface scuffing front and back and a small, very pale cup ring below a little droplet mark on the front, otherwise sound. 46pp., illustrated; Part Two of the Iowa Inventors and Inventions special by Homer L. and Corrine Calkin. Diagrams! Including, in 1873, a bell-striking (rather than string-striking) piano and a pinball table! Also prosthetics, bridges, guns, and pens, but pinball!