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78 SOLAR POWER SYSTEM PHYSICS AND TECHNOLOGIES
Figure 3.38 The Baghdad battery.
Italian physicist, in 1800 reported the invention of his electric battery, or “pile.” The
battery was made by piling up layers of silver, paper or cloth soaked in salt, and zinc.
Many triple layers were assembled into a tall pile, without paper or cloth between the
zinc and silver, until the desired voltage was reached. Even today, the French word for
battery is pile, pronounced “peel” in English. Volta also developed the concept of the
ASPHALT
STOPPER
COPPER
CYLINDER
IRON ROD
ASPHALT
INSULATOR
Figure 3.39 Elements of the Baghdad battery.
