Page:The Formation of Vegetable Mould through the Action of Worms (1881).djvu/340

• Worms, contents of intestines, acid, 51
• —Worms,— — — their castings, acid, 52
• —Worms,— — — power of suction, 56
• —Worms,— — — plugging up their burrows, 58
• —Worms,— — — intelligence of, 64
• —Worms,— — — formation of their burrows, 98
• —Worms,— — — number of, living in a given area, 158
• —Worms,— — — penetrating ancient walls, 188, 209
• —Worms,— — — gizzards of, and the trituration of the contained stones, 246
• —Worms,— — — prefer to live in fine earth, 291
• Wright, Mr., on the age of Wroxeter, 221
• Wroxeter, old Roman town of, 221