The Formation of Vegetable Mould Through the Action of Worms: With Observations on Their HabitsAppleton, 1892 - 326 pagini |
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Pagina 7
... disintegration of rocks by the humus - acids-- Similar acids apparently generated within the bodies of worms - The action of these acids facilitated by the continued movement of the particles of earth A thick bed of mould checks the ...
... disintegration of rocks by the humus - acids-- Similar acids apparently generated within the bodies of worms - The action of these acids facilitated by the continued movement of the particles of earth A thick bed of mould checks the ...
Pagina 7
... disintegration of the underlying materials . 66 As I was led to keep in my study during many months worms in pots filled with earth , * Leçons de Géologie Pratique , ' tom . i . 1845 , p . 140 . I became interested in them , and wished ...
... disintegration of the underlying materials . 66 As I was led to keep in my study during many months worms in pots filled with earth , * Leçons de Géologie Pratique , ' tom . i . 1845 , p . 140 . I became interested in them , and wished ...
Pagina 43
... disintegration by the unarmed mouths of worms that they should first be moistened and softened ; and fresh leaves , however soft and tender they may be , are similarly treated , probably from habit . The result is that they are ...
... disintegration by the unarmed mouths of worms that they should first be moistened and softened ; and fresh leaves , however soft and tender they may be , are similarly treated , probably from habit . The result is that they are ...
Pagina 80
... disintegrated or decayed near the base than elsewhere . It is thus evident that the thick basal end of the petiole is drawn in not solely for the sake of plugging up the mouths of the burrows , but as food . Even the narrow truncated ...
... disintegrated or decayed near the base than elsewhere . It is thus evident that the thick basal end of the petiole is drawn in not solely for the sake of plugging up the mouths of the burrows , but as food . Even the narrow truncated ...
Pagina 126
... their surfaces had suffered some disintegration and they were penetrated by many fine roots . A drawing is here given ( Fig . 4 ) of one which seems to have best retained its original size and appearance 126 CHAP . II . HABITS OF WORMS .
... their surfaces had suffered some disintegration and they were penetrated by many fine roots . A drawing is here given ( Fig . 4 ) of one which seems to have best retained its original size and appearance 126 CHAP . II . HABITS OF WORMS .
Alte ediții - Afișează-le pe toate
The Formation of Vegetable Mould: Through the Action of Worms, with ... Charles Darwin Vizualizare completă - 1896 |
The Formation of Vegetable Mould, Through the Action of Worms, with ... Charles Darwin Vizualizare completă - 1898 |
The formation of vegetable mould, through the action of worms, with Charles Darwin Vizualizare completă - 1897 |
Termeni și expresii frecvente
accumulated acetic acid acid action of worms alimentary canal amount angle animals apex appear basal base Beaulieu Abbey beneath the surface blown bodies brought buried burrows calciferous carbonic acid cells cent chalk Cloth concrete covered depth disintegration doubt dragged drawn earth feet field flints floor formed fragments gizzards glands grass ground heavy rain Hensen holes Illustrations inches beneath inches deep inches in thickness inches thick intestines JOSEPH LE CONTE Knole Park lamellæ land large number larvæ layer leaf leaves ledges Leith Hill Place lime Maer Hall manner matter mortar mouths nearly objects observed particles pasture pavement penetrated Perrier petioles pharynx places ploughed plugging pots probably Roman villa rubbish sand seen seized side Silchester slope soil species square yard Stonehenge stones subsided swallowed tesselated tiles tips trench triangles triturated turf upper vegetable mould walls washed weather weight whilst worm-castings worms
Pasaje populare
Pagina 1 - II. Physics and Politics ; or, Thoughts on the Application of the Principles of "Natural Selection " and " Inheritance
Pagina 2 - XVIII. THE NATURE OF LIGHT. With a General Account of Physical Optics.
Pagina 2 - XXIII. Studies in Spectrum Analysis. By J. Norman Lockyer, FRS With six photographic Illustrations of Spectra, and numerous engravings on Wood.