Solidarity (Cleveland). Vol. 6 No. 280. May 22, 1915.
The most widely read of I.W.W. newspapers, Solidarity was published by the Industrial Workers of the World from 1909 until 1917. First produced in New Castle, Pennsylvania, and born during the McKees Rocks strike, Solidarity later moved to Cleveland, Ohio until 1917 then spent its last months in Chicago. With a circulation of around 12,000 and a readership many times that, Solidarity was instrumental in defining the Wobbly world-view at the height of their influence in the working class. It was edited over its life by A.M. Stirton, H.A. Goff, Ben H. Williams, Ralph Chaplin who also provided much of the paper’s color, and others. Like nearly all the left press it fell victim to federal repression in 1917.
PDF of full issue: https://www.marxists.org/history/usa/pubs/solidarity-iww/1915/v06-w280-may-22-1915-solidarity-joe-hill.pdf