Nathan Knorr was appointed as third president of the Watch Tower Bible and Tract Society in 1942. Knorr commissioned a new translation of the Bible, the New World Translation of the Holy Scriptures, the full version of which was released in 1961. He organized large international assemblies, instituted new training programs for members, and expanded missionary activity and branch offices throughout the world. Knorr's presidency was also marked by an increasing use of explicit instructions guiding Witnesses in their lifestyle and conduct, and a greater use of congregational judicial procedures to enforce a strict moral code.

Who was appointed as the third president of the Watch Tower Bible and Tract Society in 1942?