[N] Sources: _Industrial Worker_ (I), August, 1906; _Miners Magazine_, Sept. 7, 1905, p. 15; Marot, _American Labor Unions_, p. 59; St. John, _op. cit._, p. 23. [O] Sources: _Proceedings 2nd I. W. W. Convention_, p. 43; _Third I. W. W. Convention, Official Report No. 1_, p. 2; Report of the I. W. W. to the Stuttgart International Socialist Congress, _Industrial Union Bulletin_, August 10, 1907, p. 3, col. 3; Massachusetts Bureau of Labor and Industry, _Annual Report on Labor Organizations_, 2nd to 7th, inclusive (1909-1914); _The Industrial Worker_, May 14, 1910, p. 2, and Jan. 5, 1911, p. 2; Marot, _op. cit._, Appendix. [P] Sources: _Miners Magazine_, issues from Oct. 1, 1906, to Feb. 1, 1907; Report of the secretary-treasurer to 3rd I. W. W. Convention, _Industrial Union Bulletin_, Sept. 14, 1907, p. 7, col. 1. [Q] Number issued up to Feb. 1, 1906, including 185 charters issued to the Mining Department (W. F. of M.) (_Miners Magazine_, Feb. 22, 1906, p. 14). [R] _Solidarity_, May 27, 1916, p. 3, col. 1. This figure is for the first five months of 1916. [S] Figures in the Detroit column are from Oct. 1, 1908. [T] W. F. M. (Mining Department) locals. _Miners Magazine_, Sept. 7, 1905, p. 15. [U] Oct. 1, 1907, to Oct. 1, 1908 (_Industrial Union Bulletin_, Oct. 10, 1908, p. 2, col. 3). TABLE B.--COMPARATIVE MEMBERSHIP FIGURES, 1910[727] -------------------------------------------------------------------------------- | | | Members of the I. W. W. | | |---------------------------- | | | | Per | Per | | | | cent. | cent. |Total | Members of | | of all |of total |number of | Labor | | trade | in |persons |Organizations | Number. | union- | ind- Industry. |in the | | | ists. | ustry. |industry. |--------------+-----------+--------+------- | | |Per |Chi- |Det- | | | | | | Number. |cent|cago.|roit.| C.| D.| C.| D. -------------------------+----------+---------+----+-----+-----+----+---+---+--- Mining[728] | 834,456| 254,779|30.5| 200| .. | 0.1| ..|0.0| .. Clothing industries[729] | 608,892| 102,972|16.9| .. | 300 | ..|0.3| ..|0.0 Quarrying | 85,919| 6,309| 7.3| | | | | | Production of salt, oil | | | | | | | | | and natural gas | 37,476| | | | | | | | Chemical and allied | | | | | | | | | industries | 73,585| 268| 0.4| | | | | |