Airplanes - Materials - Castor Bean Culture, Dade City, Florida. Close view of castor bean field. The oil which is made from the beans is used as a lubricant for airplane engines since high altitude does not freeze it. The industry is practically new in this country as a result of war needs. Several tons of castor seeds were supplied by the British government in order to get the industry properly started here. From Geo. H. Walker
Summary
Date Taken: 6/5/1918
Photographer: Geo. H. Walker
Airplanes - Materials
Tags
Date
1917 - 1918
Source
The U.S. National Archives
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