Boston: James Means, 193 Beacon St. 1913. First edition. 12mo, original self-wrappers,  pages. Illus. A trifle dust-soiled; a fine copy. Item #15910
"Mental automatism in balancing may be illustrated by the experience of the novice learning to ride the bicycle." From this aeronautical pioneer (best remembered for his Aeronautical Annuals, published from 1895 to 1897) comes this circular touting his design of a steering control for tandem airplanes for instruction of new pilots. Means invites inquiriies to license the design for manufacture.