Template:Selected anniversaries/June 19: Difference between revisions

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File:Joseph_Diez_Gergonne.jpg|link=Joseph Diez Gergonne (nonfiction)|1771: Mathematician and logician [[Joseph Diez Gergonne (nonfiction)|Joseph Diez Gergonne]] born. He will contribute to the principle of duality in projective geometry, by noticing that every theorem in the plane connecting points and lines corresponds to another theorem in which points and lines are interchanged, provided that the theorem embodied no metrical notions.  
File:Joseph_Diez_Gergonne.jpg|link=Joseph Diez Gergonne (nonfiction)|1771: Mathematician and logician [[Joseph Diez Gergonne (nonfiction)|Joseph Diez Gergonne]] born. He will contribute to the principle of duality in projective geometry, by noticing that every theorem in the plane connecting points and lines corresponds to another theorem in which points and lines are interchanged, provided that the theorem embodied no metrical notions.  


||1783: Friedrich Sertürner born ... chemist and pharmacist.
||1783: Friedrich Sertürner born ... chemist and pharmacist, best known for his discovery of morphine in 1804. Pic.


File:James Braid.jpg|link=James Braid (nonfiction)|1795: Surgeon and gentleman scientist [[James Braid (nonfiction)|James Braid]] born. He will be an important and influential pioneer of hypnotism and hypnotherapy.   
File:James Braid.jpg|link=James Braid (nonfiction)|1795: Surgeon and gentleman scientist [[James Braid (nonfiction)|James Braid]] born. He will be an important and influential pioneer of hypnotism and hypnotherapy.   

Revision as of 17:05, 2 September 2018