Encyclopaedia Britannica Eleventh Edition Volume XXVII-XXVIII, covering Tonalite to Zym, published 1911. Iconic vintage reference book bound in green cloth with gold spine lettering. Produced by Cambridge University and Encyclopaedia Britannica Inc. Book shows moderate shelf and edge wear, softened corners, and some wrinkling to interior pages, but all pages intact. Ideal for collectors, historians, or vintage décor. Sought after for historical value and display as a classic early 20th-century encyclopedia.