*See also:* 1834 in science, other events of 1835, 1836 in science and the list of years in science.

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2 Mathematics 3 Physics 4 Technology 5 Awards 6 Births 7 Deaths |

- Vinyl chloride first produced by Justus von Liebig and his student Henri Victor Regnault

- Dirichlet proves Dirichlet's theorem about prime numbers in arithmetical progressions

- William Rowan Hamilton states Hamilton's canonical equations of motion
- Gaspard-Gustave Coriolis examines motion on a spinning surface deduces the Coriolis effect

- Samuel Colt invents the revolver
- Samuel Morse develops the Morse code

- March 24 - Jožef Stefan, physicist and mathematician († 1893)
- March 29 - Gustaf Zander, physician († 1920)
- Simon Newcomb, mathematician and astronomer († 1909)

- Friedrich Strohmeyer, chemist (* 1776)
- John Brinkley, astronomer (* 1763)