This is a honey, one of the best things of the kind I have seen. In fine photographs, especially selected for the purpose, there is told the story of industrialization of raw products. Wheat and cotton and ore come from the earth; food and clothing and machinery and building materials and fuel and power are produced. Workers on the farm, workers in the mines, workers in industry make their contribution and transportation facilities carry the finished goods to us. The author did another similar book on transportation, Sails, Wheels, and Wings. Sell the two as a unit for plus business. This book should be a good library and school item, in spite of board covers.