3614168 A steam driven traction engine and a multi bladed plough designed by John Fowler in the 19th century, from Les Merveilles de la Science, pub.1870 by French School, (19th century); (add.info.: A steam driven traction engine and a multi bladed plough designed by John Fowler in the 19th century. The plough had two sets of four blades which were individually lowered and used depending on which direction it was being pulled by chains powered by the steam engine. From Les Merveilles de la Science, published 1870.); French, out of copyright.