The files in this directory contain Doug Reeder's senior thesis: "Tethers for Space Propulsion Without Reaction Mass" in two formats. The beginning and the end contain a short summary of the tether concept and some of its uses. The main body is an analysis of the dynamics of an orbiting mass barbell. It is not a general introduction to tethers. The file "reeder.thesis.dvi" is a TeX device independant file containing the complete text of the thesis. You must ftp it in BINARY mode. Consult your local documentation for information on printing ".dvi" files. The file "reeder.thesis.ps" is a PostScript file containing the complete text of the thesis. You must ftp it in ASCII mode. Consult your local documentation for information on printing PostScript files.