The 200-Ton Machine That Played Music for the Masses

In 1893, Thaddeus Cahill envisioned a machine that could generate perfect musical tones using electric dynamos. Influenced by Hermann von Helmholtz’s studies of tone and harmonics, Cahill set out to create the Telharmonium, an instrument capable of replicating orchestral sounds and broadcasting music over telephone lines. The instrument’s final design weighed 200 tons and was a marvel of early engineering.

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The Man Who Charted the Moon

Born in 1611 in Danzig (modern Gdańsk, Poland), Johannes Hevelius inherited his family’s brewing business but devoted his wealth to astronomy. In 1641, he built a rooftop observatory in his home, which became one of Europe’s finest centers for celestial observation.

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