1735 in science
The year 1735 in science and technology involved some significant events.
Astronomy
- July 11 - Pluto enters a fourteen-year period inside the orbit of Neptune, which will not recur until 1979.
Biology
- Carl Linnaeus publishes the first edition of his Systema Naturæ in Leiden.
Chemistry
- Cobalt is discovered and isolated by Georg Brandt. This is the first metal discovered since ancient times.
Earth sciences
- May – French Geodesic Mission sets out for Ecuador.
Mathematics
- Leonhard Euler solves the Basel problem, first posed by Pietro Mengoli in 1644, and the Seven Bridges of Königsberg problem.
Meteorology
- May 22 – George Hadley publishes the first explanation of the trade winds.
Physiology and medicine
- December 6 – The second successful appendectomy is performed by naturalised British surgeon Claudius Aymand at St George's Hospital in London.
Births
- April 21 – Ivan Petrovich Kulibin, Russian inventor
- May 17 – John Brown, Scottish physician
- August 7 – Claudine Picardet, French, chemist, mineralogist, meteorologist and scientific translator
- September 6 – John Joseph Merlin, Liégeois-born inventor
- October 6 – Jesse Ramsden, English scientific instrument maker
- December 4 – Josephus Nicolaus Laurenti, Viennese herpetologist