Measuring The World
summary
A rapid tour of measurement history gives concrete claims and surprises: the Egyptian cubit ≈50 cm, the Roman mille passus = 1,000 paces later morphing into the mile for tax reasons, Napoleon spreads the metric system, Jefferson orders prototype weights that are lost to "parrots", and Columbus errs because he uses an Arab mile 25% larger and underestimates Eurasia by about fourfold. A modern example times a non‑UK resident getting insulin at roughly 5 hours, arguing for simple benchmarks, profiling tools and adding real metrics to apps where many professionally built C++ systems currently lack them.
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