Hydrocyanic-acid gas fumigation in California: 1, Fumigation of citrus trees [with list of writer's published articles and addresses on fumigation investigation in California], by R. S. Woglum; 2, Value of sodium cyanid for fumigation purposes, by R. S. Woglum; 3, Chemistry of fumigation with hydrocyanic-acid gas, by C. C. McDonnell.