"Encyclopaedia Britannica, 11th Edition, 'Matter' to 'Mecklenburg'" by Various is a reference work published between 1910-1911. This volume forms part of the celebrated 29-volume eleventh edition, marking the encyclopedia's transition from British to American publication. Featuring 40,000 entries written by leading scholars including Bertrand Russell and Ernest Rutherford, it captured knowledge and attitudes of the era immediately before World War I. Now in the public domain, it serves as both a historical time capsule and a window into early twentieth-century thought and empire.