The principles and practicalities of crop rotation, illustrated in glorious Technicolor film with diagrams and models. British eighteenth-century farmers were the . A young man learns to become a farmer, keen to show the integration of traditional farming with modern science and education. Agriculture today is a big . American women at work in the Willow Run Consolidated B-24 Liberator aircraft production plant in Ypsilanti, Michigan. Scenes show American women working . The sights of 1930s San Francisco and Northern California are seen from the air and on the ground, filmed using the Cosmocolor process. Cablecars .