1704 in science

The year 1704 in science and technology involved some significant events.

General

* John Harris publishes the first edition of the "Lexicon Technicum", an encyclopedic dictionary of science.

Geology

* An earthquake strikes Gondar in Ethiopia.

Meteorology

* Daniel Defoe documents the Great Storm of 1703 with eyewitness testimonies in "The Storm" (1704).

Physics

* Isaac Newton releases a record of experiments and the deductions made from them in "Opticks", a major contribution in study of optics and refraction of light.

Technology

* The second electric machine is invented by British engineer Francis Hauksbee the Elder (1666-1713): the machine was a sphere of glass rotated by a wheel.
* For watch movements, Peter Debaufre invents the Debaufre escapement, the first frictional rest watch escapement produced: the escapement consists of two saw-tooth escape wheels of the same count.
* For watch bearings, a jewel bearing made of ruby, comprising a ring (the "hole") with a sink for oil, is invented by Nicholas Facio with Peter and Jacob Debaufre, who used pierced natural rubies. Other gemstones have been used since, including garnet (which is too soft) and diamonds. In the 20th century, synthetic ruby or sapphire becomes universal for jewel bearings.
* In oil painting, colormaker Diesbach of Berlin (Germany) accidentally invents the pigment Prussian Blue, a powerful dark blue pigment with greenish undertones (made from alum and animal bones); therefore, Prussian blue cannot be found in a paint layer predating 1704.

Births

* February 28 - Louis Godin, French astronomer (died 1760)
* June 4 - Benjamin Huntsman, English inventor and manufacturer (died 1776)
* June 17 - John Kay, English inventor (died 1780)
* July 31 - Gabriel Cramer, Swiss mathematician (died 1752)
* (c. 1704) - William Battie, English psychiatrist (died 1776)
* "undated" - Richard Pococke, English anthropologist and explorer (died 1765)

Deaths

* February 2 - Guillaume François Antoine, Marquis de l'Hôpital, French mathematician (born 1661)
* April 15 - Johann van Waveren Hudde, Dutch mathematician (born 1628)
* July 7 - Pierre-Charles Le Sueur, French fur trader and explorer (born c.1657)