From patent application, filed 23 March 1903, patented 22 May 1906, page 1.
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North Carolina in the early 20th century: Primary sources and readings explore North Carolina in the first decades of the twentieth century (1900–1929). Topics include changes in technology and transportation, Progressive Era reforms, World War I, women's suffrage, Jim Crow and African American life, the cultural changes of the 1920s, labor and labor unrest, and the Gastonia stirke of 1929. (Page 1.6)