See Figure 1. The equipment beside a fire cooking something with an odd-shaped pot is a wireless communication gear. At the bottom of the pot, thermoelectric element couples made of zinc antimony(ZnSb composite semiconductor) and constantan(CuNi alloy) are installed. The pot was called "Partisan's canteen" that were used at the World War II(Russo-German War) in Soviet Union at around 1940. A canteen may not be popular for everyone, it is a portable cooking pot usually used by soldiers or campers in the outdoors. The pot in the illustration is much like home cooking one, a bit different from a typical curved canteen. The temperature at the bottom of the pot scorched by fire could have reached to several hundred degrees centigrade, while the temperature of the content of the pot should have been around 100°C, the temperature difference possibly was kept above 200°C. To call this system "a thermoelectric generation" sounds a bit exaggerated, it rather appropriately be called "a campfire electric generation". Any way, this can truly be admitted the very first practical beginning of thermoelectric generation.