Tonka (fuel) 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 Second World War, it has no connection to the similarly named toys. Its composition is approximately 50% triethylamine and 50% xylidine, with the most common oxidizer
The Spice Trail seeks to maintain the high quality of saffron and to protect it from fraud and impurities which would devalue the genuine product. In the second half of the program we discover that Vanilla is a Mexican spice. The Pollination is performed by the Melipona bee that is native to Mexico and we find that it was not possible to grow vanilla elsewhere in the world until a slave boy discovered how to self-pollinate the plants. Once artificial pollination was discovered the price collapsed and the vanilla trade in Mexico is now greatly reduced compared to what it used to be.