Title 29-LABOR is composed of nine volumes. The parts in these volumes are arranged in the following order: Parts 0-99, parts 100-499, parts 500-899, parts 900- 1899, part 1900-§ 1910.999, part 1910.1000-end of part 1910, parts 1911-1925, part 1926, and part 1927 to end. 3