A magazine article from 1870 on the rise of sericulture in California. It argues that the dry, mild climate suits silkworms, and it contrasts this with the silkworm disease in Europe and the spread of a parasitic fly in Japan. It covers the egg trade with France and Italy, the pioneer Louis Prevost near San Jose, growers' profits per acre, mulberry cultivation, feeding methods, and plans for a San Francisco silk manufactory.