Prismatic And Diffraction Spectra;

Bibliography: p. 64-[65] Determination of the refractive and the dispersive power of different kinds of glass with reference to the perfecting of achromatic telescopes.--New modification of light by the reciprocal influence and diffraction of the rays, and the laws of this modification.--Short account of the results of new experiments on the laws of light and their theory.--Biographical sketch of Fraunhofer.--A method of examining refractive and dispersive powers by prismatic reflection, by W. H