The Formation of Vegetable Mould Through the Action of Worms: With Observations on Their HabitsAppleton, 1892 - 326 pagini |
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Pagina 7
... ancient encampments and tumuli— The preservation of the crowns and furrows on land anciently ploughed - The formation and amount of mould over the Chalk formation 259-304 CHAPTER VII . CONCLUSION . Summary of the part which vi CONTENTS .
... ancient encampments and tumuli— The preservation of the crowns and furrows on land anciently ploughed - The formation and amount of mould over the Chalk formation 259-304 CHAPTER VII . CONCLUSION . Summary of the part which vi CONTENTS .
Pagina 9
... chalk - downs , so as almost to cover the whole surface , where the soil is poor and the grass short and thin . But they are almost or quite as numerous in some of the London parks , where the grass grows well and the soil appears rich ...
... chalk - downs , so as almost to cover the whole surface , where the soil is poor and the grass short and thin . But they are almost or quite as numerous in some of the London parks , where the grass grows well and the soil appears rich ...
Pagina 36
... chalk , into their burrows , I feel some doubt whether the starch was used as food . Pieces of raw and roasted meat were fixed several times by long pins to the surface of the soil in my pots , and night after night the worms could be ...
... chalk , into their burrows , I feel some doubt whether the starch was used as food . Pieces of raw and roasted meat were fixed several times by long pins to the surface of the soil in my pots , and night after night the worms could be ...
Pagina 49
... chalk , often have their intestines filled with this substance , and their castings are almost white . * De Vries , Landwirth . Jahrbücher , ' 1881 , p . 77 . Here it is evident that the supply of cal- careous CHAP . I. 49 CALCIFEROUS ...
... chalk , often have their intestines filled with this substance , and their castings are almost white . * De Vries , Landwirth . Jahrbücher , ' 1881 , p . 77 . Here it is evident that the supply of cal- careous CHAP . I. 49 CALCIFEROUS ...
Pagina 52
... chalk , were of a whitish colour and abounded with calcareous matter ; and these were not in the least acid . This shows how effectually carbonate of lime neutralises the intestinai acids . When worms were kept in pots filled * M ...
... chalk , were of a whitish colour and abounded with calcareous matter ; and these were not in the least acid . This shows how effectually carbonate of lime neutralises the intestinai acids . When worms were kept in pots filled * M ...
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 - 1897 |
The Formation of Vegetable Mould, Through the Action of Worms, with ... Charles Darwin Vizualizare completă - 1890 |
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.