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chemical reaction
the changing of substances into other substances by the breaking of old bonds and the formation of new bonds
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  February 14 in chemistry
  1862 - Agnes Pockels born: liquid surfaces: surface tension and films; invention of the slide trough and surface film balance.
  1873 - Dennis Searle and E. M. Skillings found borax and other soluble salts at San Bernardino, CA.
  1878 - Julius Nieuwland born: synthetic rubber pioneer; acetylene chemistry.
  1889 - Evan J. Crane born: editor of Chemical Abstracts, 1915-58.
  1917 - Herbert A. Hauptman born: mathematical methods for crystal structures; Nobel Prize, 1985.
  1961 - Lawrencium (Lr, element 103) was produced by Torbjorn Sikkeland, Albert Ghiorso, and Almon Larsh and Robert Latimer, at University of California, Berkeley.
   sources: http://webserver.lemoyne.edu/faculty/giunta/week.html, http://todayinsci.com

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