The year 1838 in science and technology involved some significant events, listed below.
Astronomy
Friedrich Wilhelm Bessel makes the first accurate measurement of distance to a star, 61 Cygni, using parallax. Thomas Henderson (Alpha Centauri) and Friedrich Georg Wilhelm Struve (Vega) announce their measurements using parallax shortly afterwards.
Jean Esquirol publishes Des maladies mentales considerées sous le rapport médicale, hygiènique et médico-legal in Paris. This includes the first description of what will later become known as Down syndrome.[7]
January 6 – Samuel Morse first publicly demonstrates the electrical telegraph.
April 4–22 – The paddle steamer SS Sirius (1837) makes the Transatlantic Crossing to New York from Cork, Ireland, in eighteen days, though not using steam continuously.[9]
April 8–23 – Isambard Kingdom Brunel's paddle steamer SS Great Western (1838) makes the Transatlantic Crossing to New York from Avonmouth, England, in fifteen days, inaugurating a regular steamship service.[10]
Liverpool-built barqueIronsides becomes the first large ocean-going iron ship.[11]
William Barnett obtains a United Kingdom patent for an internal combustion engine, the first with compression of the gas/air mixture in the cylinder.[12][13]
David Bruce, Jr., invents the Pivotal Typecaster, which replaces hand typecasting in printing.
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