World Wires · story 44763 · corroborated · 1 source(s)

How a Pittsburgh plumber built an aluminium observatory in 1930

In 1930, Pittsburgh plumber Leo Scanlon built a lightweight aluminium observatory dome, leading to a 1934 meeting with Albert Einstein.

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• How a Pittsburgh plumber built an aluminium observatory in 1930 Times of India World · tier B · clear net · 2026-10-14 20:14 UTC

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