26: January 24, 1922 - December 31, 1923  27: January 12, 1924 - May 21, 1924  28: May 22, 1924 - August 15, 1924  29: August 16, 1924 - December 26, 1924  30: December 27, 1924 - March 21, 1925  31: March 22, 1925 - June 15, 1925  32: June 17, 1925 - September 24, 1925  33: September 25, 1925 - February 10, 1926  34: February 11, 1926 - April 1, 1926  35: April 2, 1926 - July 7, 1926  36: July 8, 1926 - November 10, 1926  37: November 11, 1926 - January 1, 1927  38:  January 2, 1927 - June 3, 1927  39: June 4, 1927 - September 1, 1927  40: September 2, 1927 - December 1, 1927  41: December 2, 1927 - May 1, 1928  42: May 2, 1928 - September 9, 1928  43: September 10, 1928 - January 14, 1929  44: January 16, 1929 - February 3, 1929  45: February 4, 1929 - May 11, 1929  46: May 12, 1929 - August 31, 1929  47: September 1, 1929 - November 20, 1929  48: November 21, 1929 - April 2, 1930  49: April 3, 1930 - August 22, 1930  50: August 23, 1930 - January 5, 1931