The year 1745 in science and technology involved some significant events.


The Omega Nebula, Messier 25, Messier 35, and IC 4665 are discovered by Philippe Loys de Chéseaux.


Charles Bonnet publishes his first work on entomology, entitled Traité d'insectologie.


The Cassini projection, a type of map projection, is described by César-François Cassini de Thury.


May 2 - The Company of Surgeons separates from the Company of Barbers of London.
The Dublin Lying-In Hospital is established by Bartholomew Mosse.


The Leyden jar, a device for storing electric charge, is invented by Pieter van Musschenbroek. It Is the first capacitor.
Ruđer Bošković publishes De Viribus Vivis in which he tries to find a middle way between Newton's gravitational theory and Leibniz's monadology, developing a concept of "impenetrability" as a property of hard bodies which explains their behavior in terms of force rather than matter.[1]


The first blasting cap, or detonator, is demonstrated by a Dr. Watson of the Royal Society.


Copley Medal: William Watson


January 6 - Jacques Étienne Montgolfier, French inventor (d. 1799)
January 7 - Johan Christian Fabricius, Danish entomologist (d. 1808)
January 23 - William Jessop, English civil engineer (d. 1814)
February 18 - Alessandro Volta, Italian physicist and chemist (d. 1827)
April 20 - Philippe Pinel, French psychiatrist (d. 1826)
April 26 - Johann Anton Güldenstädt, German naturalist and explorer (d. 1781)
November 30 - Jean-Louis Baudelocque, French obstetrician (d. 1810)
15 December 1745 Birth of Johann Gottfried Köhler in Sachsen, Germany German astronomer (d. 1801
December 28 - Juan de Ayala, Spanish explorer (d. 1797)
William Cruikshank, Scottish-born anatomist and chemist (d. 1800)

1745 Birth of Tadataka Ino in Kazusa, Chiba Prefecture, Japan


November 30 - Johann Bessler, German inventor (b. 1680)


^ Scott, Wilson L. (1970). The Conflict between Atomism and Conservation Theory 1644-1860. London: Macdonald. ISBN 0-356-02706-6.

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