Tonka (fuel) necessary for the mixture to work as desired, rather than fail catastrophically, is a function both of the ingredients' purity, and of their temperature during use. Tonka (fuel) Tonka (also TONKA-250 and R-Stoff) is the name given to a German-designed rocket propellant first used in the Wasserfall missile; it has also more recently been used by North Korea but found its greatest applications (under the name TG-02) in the Soviet Union, for example, in the propulsion projects of the A.M. Isayev Chemical Engineering Design Bureau. Its name is a reference to the tonka bean; as it was invented during the
Vanilla production in French Polynesia planifolia", which is not a direct competitor. Mexican vanilla is used almost exclusively as the base of vanilla extract, due to higher vanillin levels. Tahitian vanilla is used primarily in perfume because of its coumarin-like scent. Other Tahitian vanilla products include vanilla green tea, vanilla oil, vanilla powder, vanilla rum, and vinegar-based vanilla. Vanilla, originally a crop endemic to South America, was introduced in French Polynesia in 1848 by Admiral Ferdinand-Alphonse Hamelin, a French commander in the Pacific. The admiral delivered several dozen specimens of the plant to the Tahitian Governor's garden in Papeete. A new variety of vanilla was