Keywords: Abbe refractometer.jpg en Drawing of an Abbe refractometer with temperature-controlled prisms Page 131 of Bulletin by the U S Bureau of Chemistry Harvey W Wiley editor 1908 See http //books google com/books id h9tIAAAAMAAJ pg PA131 dq abbe+refractometer lr as_brr 1 PPA131 M2 this site for the drawing PD-USGov Ernst Abbe Refractometers |