Complex sentence: He did consulting work and served on an advisory committee of the Army Ballistics Research Laboratories after retirement from General Electric and was elected a member of the National Academy of Sciences and served as president of the American Physical Society in 1942.
Split into simpler sentences: He did consulting work and served on an advisory committee of the Army Ballistics Research Laboratories after retirement from General Electric and was elected a member of the National Academy of Sciences. He also served as president of the American Physical Society in 1942.