In this paper the relation between apoohromatism and super-apochromatism of the optical systems and the relative partial dispersion of inorganic glasses are discussed and the application conditions of the dispersion formula of glasses are dealt with. Based on the dispersion formula and dispersion data of the glasses, the eigen absorption frequency in ultraviolet range, the vibrational absorption frequency in infrared and their oscillator strength of a series of glasses have been calculated by computer. The relationship between these properties and chemical composition and structure of glasses are also considered. Infrared and ultraviolet absorption spectra of a series of inorganic glasses have been measured. Good agreement has been found between the measured and calculated value of the ultraviolet outofF wavelength as well as the infrared absorption wavelength at the highest energy. In addition, the relationship between relative partial dispersion and chemical composition of glasses has been established and a method for calculating the relative partial dispersion of glass from ohemical composition are presented. By this method, the relative partial dispersions of about one hundred kinds of optical glasses has been calculated. Because of difficulty in measuring the relative partial dispersion, our calculation method can be used to oalculate and adjust the relative partial dispersion of optical glasses. The ohanging rules of the relative partial dispersion for various oxides and fluorides in glasses are analysed, which oan be used for designing new glass composition with anomalous dispersion.