In 1890 the state board of forestry estimated that the redwood forests were in danger of exhaustion by 1930.
Bingham, A Residence of Twenty-one Years in the Sandwich Islands (Hartford, 1848); Isabella Bird, Six Months in the Sandwich Islands (New York, 1881); Adolf Bastian, Zur Kenntnis Hawaiis (Berlin, 1883); the annual Reports of the governor of Hawaii, of the Hawaii Agricultural Experiment Station, of the Hawaiian Sugar Planters' Experiment Station, of the Board of Commissioners on Agriculture and Forestry, and of the Hawaii Promotion Committee; and the Papers of the Hawaiian Historical Society.
Forestry is a state-protected industry, the government owning over 500,000 acres of forest.
Cattlerearing and forestry form the other principal occupations of the inhabitants.
Members of the forest service undergo a preliminary course of instruction at a school of forestry, and a further course at the Institute of Forestry, Stockholm, which dates from 1828.