Emerald Diamond Party Earrings Jewellery Collection 24

Emerald Diamond Earrings Jewellery.
By Aamir Mannan.
16. DOUBLE REFRACTION AND DISPERSION

hemisphere, but the principle of the instrument is exactly the same. the prism form was originally evolved to allow isotropic minerals to be use in glass. special anderson-payne models incorporating synthetic spinal, blend, and diamond have been made which have 

certain advantages as well as certain limitations compared with standard refractometers. in rayne refractometers the scale extends from 1.30 to 1.86. in spinal model the shorter range of 1.30 to 1.68 allows a more open scale to be used, while the long upward range of the diamond refractometer, 1.55 to 2.05, necessitates a sliding eyepiece for scanning the scale. Several refractometer to Amarican manufacture are available in the U.S.A these operate on precisely the same principle as the british

types describe in these pages, and the instructions givin will apply to them equally well.