Polhem, Christopher and William Johnson. Christopher Polhem : The Father of Swedish Technology.
Hartford. Trinity College : Hardcover, leather spine with cardboard boards. Good
Limited to 5000 copies. 259 pp
Chapters include : A Contribution to the Biography of Christopher Polhem, Polhem's Contributions to Applied Mechanics, Polhem, the Mining Engineer, Polhem's Contribution to the Art of Building, and A Contibution to a Polhem Bibliography. Pamphlet insert included 'Christofer Polhammar, ennobled Polhem. The Archimedes of the North 1661-1751.'