  Recent advances in grazing incidence X-ray optics using synchrotron radiation
sources have stimulated the need for basic research in high quality mirror
materials for novel applications. In this paper we communicate the results of
the first measurements of glazing angle X-ray reflectivity (XRR) of speculum
metal mirrors using synchrotron radiation sources. Our results agree with
similar measurements made in polished speculum gratings by Arthur Compton and
his collaborators during 1923 using ordinary X-ray tubes. Our experimental
investigations are based on synchrotron radiation research facilities (Indus 2)
maintained by Govt of India in Indore . Variations in the XRR with grazing
angles of incidence and X-ray energy for cast, thin film and electron
irradiated samples of speculum metal will be discussed in this paper.
