Postage stamps and postal history of Burkina Faso Postage stamps and postal history of Burkina Faso This is a survey of the postage stamps and postal history of Burkina Faso, known as Upper Volta until July 1984. The story of the posts in Burkina Faso begins in the 1890s, with French penetration into the area and the establishment of military posts. Prior to the creation of French Upper Volta in 1919, postal service in the area was administered by Senegambia and Niger and then Upper Senegal and Niger. Upper Volta's first stamps were issues of Upper Senegal and Niger overprinted "HAUTE-VOLTE", appearing in 1920. Overprints and surcharges continued
Volta potential of the Volta potential. Volta potential The Volta potential (also called Volta potential difference, contact potential difference, outer potential difference, Δψ, or "delta psi") in electrochemistry, is the electrostatic potential difference between two metals (or one metal and one electrolyte) that are in contact and are in thermodynamic equilibrium. Specifically, it is the potential difference between a point close to the surface of the first metal, and a point close to the surface of the second metal (or electrolyte). The Volta potential is named after Alessandro Volta. When two metals are electrically isolated from each other, an arbitrary potential difference