IN THIS ISSUE: Electric Power from Orbit: A Critique of a Satellite Power System /2 (The DOE/NASA concept of using satellites to collect solar energy on a huge scale and beam it to Earth is described by Dale R. Corson, Cornell University president emeritus and former engineering dean, who headed a national committee to assess the postulated system.) ... Global Hydroelectric Power via Reflector Satellites /9 (An innovative idea for providing a significant part of the world's energy supply is advanced by Simpson Linke, professor of electrical engineering and a specialist in power transmission.) ... Engineering Stamps: A Specialty Field of Philately /18 (Our four-color "centerfold" features United States postage stamps with an engineering theme, from the collection of Professor Fred H. Kulhawy.) ... Fusion: Its Power, Potential, and Prospects /23 (A Cornell specialist in fusion power explains and assesses a still-unproved technology under continuing development. Peter Auer is a professor of mechanical and aerospace engineering.) ... Faculty Publications /34 ... Editorial /40