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Jasmina Atarac
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Auguste LaurentBorn 14 Nov 1807; died 23 Apr 1853 at age 45. French chemist who developed organic chemistry as a distinct science. For a while, he assisted Jean Dumas, and extended his work, understanding organic compounds as derivatives of hydrocarbon molecules. In crystallography he was influenced by René-Just Haüy. Laurent recognised that carbon atoms formed bonds based on a pyramid structure. Furthermore, against the opinion of many peers, he rejected the idea held by Jöns Berzelius that even organic molecules were formed from positively and negatively charged entities. Laurent showed (1836) that a supposedly positive-charge hydrogen atom could be replaced by a supposedly negative-charge chlorine atom. He recognised families of organic compounds with characteristic groups. He died in middle age from tuberculosis.« |
There is no language wherein a double positive can form a negative
A linguistics professor was lecturing to his English class one day. “In English,” he said, “a double negative forms a positive.
In some languages, though, such as Russian, a double negative is still a negative.
However, there is no language wherein a double positive can form a negative.”
A voice from the back of the room piped up, "Yeah, right."