The research and development series ranges from c.1959 to 2005 and consists of four sub-series relating to different activities that Dr. Weaver undertook for both the public and private sectors. The first sub-series, advising and consulting, ranges from 1964 to 2004 and includes correspondence and reports written or received by Dr. Weaver in his roles advising organizations on matters relating to nuclear energy. The publications and drafts sub-series ranges from 1960 to 2005 and includes two sub-sub-series. The news/media sub-sub-series ranges from 1979 to 2005 and includes newspaper articles, some of which are in newsprint, written by Dr. Weaver about nuclear energy. The scholarly articles sub-sub-series ranges from 1960 to 2003 and includes articles and publications written by Dr. Weaver for professional journals. The speeches sub-series ranges from c.1977 to 1987 and contains typescripts and drafts of speeches given by Dr. Weaver at conferences and meetings. The supplementary research sub-series ranges from c.1959 to 1989 and contains reports, articles, and photographs relating to research not performed by Dr. Weaver but which he received.