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1920s Inventions: TV, Fridges, Polygraph by FG RT is a document available to read on EtoBox.

What is 1920s Inventions: TV, Fridges, Polygraph about?

The document summarizes three popular inventions from the 1920s: the television, home refrigerator, and polygraph (lie detector). It describes how the television was first demonstrated transmitting unclear images in the 1920s and became more advanced. Home refrigerators became widely used in the US in the 1920s but were less common in Britain initially. The polygraph was invented in 1921 but cannot truly detect lies.

Author

FG RT

Language

EN