Proceedings of the Particle Physics and Early Universe Conference (PPEUC). For this paper: postscript PPEUC CMB index 1 Introduction.. ... Mullard Radio Astronomy Observatory , Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE, U.K. The Cambridge Cosmic Anisotropy Telescope (CAT) has recently made the first detailed image of primordial anisotropies in the cosmic microwave background (CMB) radiation at 15 GHz. Preliminary results from CAT observations of a second field are presented here. ...