network of as many as 480 radio stations. A 1931 talk was broadcast throughout North America, Australia and France, but the virulence of his attacks on the clergy was strong enough to result in both the NBC and BBC radio networks banning him from the airwaves. Later still, in the late 1930s, he advocated the use of "sound cars" and portable phonographs with which talks by Rutherford were played to passersby and householders. The new preaching methods brought an influx of members through the early 1920s, but attendance at the Bible Students' yearly Memorial fell sharply again, dropping from 90,434 in 1925 to 17,380 in 1928. Rutherford dismissed their defection as the Lord "shaking out" the unfaithful. Author Tony Wills, who analyzed attendance and "field worker" statistics, suggests it was the "more dedicated" Bible Students who quit through the 1920s, to be replaced by newcomers in larger numbers, creating what author Robert Crompton described as one of the most significant of the movement's breaks with its early history. At a convention at Columbus, Ohio on July 26, 1931, Rutherford made a psychological break with the large number of disaffected Bible Students by proposing the adoption of the name Jehovah's witnesses, based on the scripture at Isaiah 43:10, "Ye are my witnesses, saith the Lord". The Watch Tower said the new, distinctive name was designed to exalt God's name and end public confusion caused by the proliferation of groups carrying the name "Bible Students". It explained: "It will be a name that could not be used by another, and such as none other will want to use." In 1932, he eliminated the system of congregations electing bodies of elders, claiming the office of elder was unscriptural; in 1938, he replaced the earlier system of congregational self-government with a "theocratic" or "God-ruled" organizational system in which the Brooklyn headquarters would make all appointments in congregations worldwide. Consolation magazine explained: "The Theocracy is at present administered by the Watch Tower Bible and Tract Society, of which Judge Rutherford is the president and general manager." Rutherford, who had shown an earlier interest in politics, applied terms to the organization that were more common in politics and business: "organization" replaced "congregation" when referring to the worldwide community of believers, while "companies" denoted individual congregations. He pushed for more "field service" and "campaigns" of kingdom "advertising" in "territories", with "publishers" working under the direction of a