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The Formation of Vegetable Mould Through the Action of Worms Charles Darwin Public domain text from Project Gutenberg. [Picture: Book cover] THE FORMATION OF VEGETABLE MOULD THROUGH THE ACTION OF WORMS WITH OBSERVATIONS ON THEIR HABITS. BY CHARLES DARWIN, LL.D., F.R.S. THIRTEENTH THOUSAND WITH ILLUSTRATIONS * * * * * LONDON JOHN MURRAY, ALBEMARLE STREET 1904 * * * * * PRINTED BY WILLIAM CLOWES AND SONS, LIMITED, LONDON AND BECCLES. * * * * * CONTENTS. 1 INTRODUCTION Page 1 6 CHAPTER I. HABITS OF WORMS. Nature of the sites inhabited Can live long under 7 15 water Nocturnal Wander about at night Often lie close to the mouths of their burrows, and are thus destroyed in large numbers by birds Structure Do not possess eyes, but can distinguish between light and darkness Retreat rapidly when brightly illuminated, not by a reflex action Power of attention Sensitive to heat and cold Completely deaf Sensitive to vibrations and to touch Feeble power of smell Taste Mental qualities Nature of food Omnivorous Digestion Leaves before being swallowed, moistened with a fluid of the nature of the pancreatic secretion Extra-stomachal digestion Calciferous glands, structure of Calcareous concretions formed i…

The Formation of Vegetable Mould Through the Action of Worms

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The Formation of Vegetable Mould Through the Action of Worms