Ernst Abbe
1840 - 1905
Ernst Karl Abbe (January 23, 1840 – January 14, 1905) was a German physicist, optical scientist, entrepreneur, and social reformer.
"Classic Kit: Abbé's refractometer", Royal Society of Chemistry, http://www.rsc.org/chemistryworld/Issues/2008/November/AbbesRefractometer.asp (accessed 08/13/2014)
"Neue deutsche Biographie, Bd.: 1, Aachen - Behaim, Berlin, 1953", Münchener Digitalisierungszentrum, http://daten.digitale-sammlungen.de/0001/bsb00016233/images/index.html?seite=22 (accessed 08/13/2014)