July Birthdays
What famous inventor or scientist has the same July birthday as you.
July 21
- 1620 Jean Picard, French astronomer who first accurately measured the length of a degree of a meridian (longitude line) and from that computed the size of the Earth
- 1810 Henri Victor Regnault, French physicist and chemist known for his research of the thermal properties of gases, also a photographer who invented the use of pyrogallic acid as a developing agent
- 1923 Rudolph Marcus, Canadian chemist who formulated the Marcus theory, the theory of electron-transfer reactions in chemical systems, Nobel Prize 1992
July 22
- 1822 Gregor Mendel, geneticist who discovered the laws of heredity
- 1844 William Archibald Spooner invented spoonerisms, a play on words
- 1887 Gustav Hertz, German quantum physicist who experimented on inelastic electron collisions in gases known as the Franck–Hertz experiments, Nobel Prize 1925
- 1908 Amy Vanderbilt might be the inventor of etiquette and wrote the Complete Book of Etiquette
July 23
- 1827 Pieter Caland, Dutch hydraulic engineer who bullt the New Waterway of Rotterdam
- 1828 Jonathan Hutchinson, English surgeon who was the first to describe the medical signs for congenital syphilis
July 24
- 1898 Amelia Earhart, American aviator, who was the first woman to pilot across the Atlantic
July 25
- 1795 James Barry, female disguised as a man who became the surgeon general of the British army
- 1866 Frederick Frost Blackman, English plant physiologist who wrote the 1905 paper, Optima and Limiting Factors, in which he demonstrated that where a process depends on a number of independent factors, the rate at which it can take place is limited by the rate of the slowest factor
July 26
- 1799 Isaac Babbitt invented "babbitt's metal" used in engine bearings
- 1860 Philippe Jean Bunau-Varilla, French engineer who helped build the Panama Canal
- 1875 Carl Jung, Swiss psychologist who invented analytical psychology known as Jungian psychology
- 1894 Aldous Huxley, English science fiction author, who wrote Brave New World
- 1919 James Ephraim Lovelock, English scientist and futurist, known for proposing the Gaia hypothesis, in which he postulates that the Earth functions as a kind of superorganism.
July 27
- 1848 Roland Baron von Eotvos, Hungarian physicist who formulated the concept of molecular surface tension, and the Eötvös torsion balance
- 1938 Gary Gygax, American game designer who co-invented Dungeons & Dragons role-playing game
July 28
July 29
- 1891 Bernhard Zondek, German gynecologist who invented the first reliable pregnancy test in 1928
July 30
- 1863 Henry Ford, American auto maker, who invented the Model T Ford
- 1887 Felix Andries Vening Meinesz, Dutch geophysicist, who invented a precise method for measuring gravity called the gravimeter. The gravimeter allowed for precise measure of gravity at sea, which led Meinesz to discover gravity anomalies above the ocean floor due to continental drift
- 1889 Vladimir Zworykin, Russian electronics engineer who invented an electronic television system
July 31
- 1803 John Ericsson, American inventor of the screw propeller for ships
- 1918 Paul D. Boyer, American biochemist, Nobel Prize 1997
- 1919 Primo Levi, Italian chemist turned writer best know for his autobiography entitled Survival in Aushchwitz
