Chocolate mill, 1886. Illustration from Cyclopaedia of Useful Arts, Mechanical and Chemical, Manufactures, Mining, and Engineering, by Charles Tomlinson, Volume I, (Jamess Virtue, London, 1886)
A flour mill, 1886. Illustration from Cyclopaedia of Useful Arts, Mechanical and Chemical, Manufactures, Mining, and Engineering, by Charles Tomlinson, Volume I, (Jamess Virtue, London, 1886)