In this latest edition of the first extensive account of the history of American scientific societies, the author has augmented his well-documented account with an important survey of the societies established during the space age. The nuclear and space age virtually replaced the lone working scientist with research teams. Government, industry, and universities began working together on major scientific projects, making the scientific society indispensable in its role of coordinator. Most of the societies established during this period are included in a new chapter, and minor revisions have been made in earlier chapters. A chronology of all scientific societies in the United States has been added, and the bibliography has been enlarged considerably—bringing this important work up to date through 1965.