A machine to rifle gun barrels...

Item # 669700

February 20, 1864

SCIENTIFIC AMERICAN, New York, Feb. 20, 1864 The front page features a nice illustration of: "Powers's Machine For Rifling Gun Barrels" with a related article.
Inside has a print and article on: "M'Kibbin's Improved Gun-Sight".
Complete in 16 pages, minor foxing, nice condition.