Tobacco Company, General Electric, Laclede Gas Company, National Lead Company, Tennessee Coal & Iron, and United States Leather Company. When the average "peaks and troughs" went up consistently, he deemed it a bull market condition; if averages dropped, it was a bear market. He added up prices, and divided by the number of stocks to get his Dow Jones average. Dow's numbers were a "convenient benchmark" for analyzing the market and became an accepted way to look at the entire stock market. In 1889 the original stock report, Customers' Afternoon Letter, became The Wall Street Journal. Named in reference to the actual street, it became an influential international daily business newspaper published in New York City. After October 7, 1896, it began publishing Dow's expanded list of stocks. A century later, there were 30 stocks in the average. 20th century Early part Business writer John Brooks in his book Once in Golconda considered the start of the 20th century period to have been Wall Street's heyday. The address of 23 Wall Street, the headquarters of J. P. Morgan & Company, known as The Corner, was "the precise center, geographical as well as metaphorical, of financial America and even of the financial world". Wall Street has had changing relationships with government authorities. In 1913, for example, when authorities proposed a $4 stock transfer tax, stock clerks protested. At other times, city and state officials have taken steps through tax incentives to encourage financial firms to continue to do business in the city. A post office was built at 60 Wall Street in 1905. During the World War I years, occasionally there were fund-raising efforts for projects such as the National Guard. On September 16, 1920, close to the corner of Wall and Broad Street, the busiest corner of the Financial District and across the offices of the Morgan Bank, a powerful bomb exploded. It killed 38 and seriously injured 143 people. The perpetrators were never identified or apprehended. The explosion did, however, help fuel the Red Scare that was underway at the time. A report from The New York Times: The area was subjected to numerous threats; one bomb threat in 1921 led to detectives sealing off the area to "prevent a repetition of the Wall Street bomb explosion". Regulation September 1929 was the peak of the stock market. October 3, 1929 was when the market started to slip, and it