Chapter keywords: growing of grains. wheat, rice;dyes; preparations of food grains; salt; sugar production; ceramics; casting and forging metal; boats and carts; hammer forging; calcination of stones; vegetable oils and fats; paper; metals; weapons; vermilion and ink; yeasts; pearls and gems; glossary; summary of dynasties; 24 solar terms; equivalence of weights and measures in metric units; transmission of techniques from China to the West.