Those glass or porcelain pieces on telephone poles are called insulators, and they have a pretty important job!
They keep electrical wires separated from the pole, preventing electricity from leaking into the structure and the ground.
Older insulators came in different shapes, sizes, and colors, with smaller ones often used for telephone and telegraph lines.
They may look like simple decorations today, but they played a big role in keeping communication and power lines working safely.
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