The Formation of Vegetable Mould Through the Action of Worms: With Observations on Their HabitsAppleton, 1892 - 326 pagini |
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Pagina 7
... fields are covered up by the castings of worms -The burial of a paved path - The slow subsidence of great stones left on the surface - The number of worms which live within a given space - The weight of earth ejected from a burrow , and ...
... fields are covered up by the castings of worms -The burial of a paved path - The slow subsidence of great stones left on the surface - The number of worms which live within a given space - The weight of earth ejected from a burrow , and ...
Pagina 7
... which it is com- posed is one of its chief characteristic features ; and this may be well observed in any gravelly country , where a recently - ploughed field 66 immediately adjoins one which has long re- mained undisturbed.
... which it is com- posed is one of its chief characteristic features ; and this may be well observed in any gravelly country , where a recently - ploughed field 66 immediately adjoins one which has long re- mained undisturbed.
Pagina 7
... fields . * With respect to " prairies élevées , " I do not know how it may be in France , but nowhere in England have I seen the ground so thickly covered with castings as on commons , at a height of several hundred feet above the sea ...
... fields . * With respect to " prairies élevées , " I do not know how it may be in France , but nowhere in England have I seen the ground so thickly covered with castings as on commons , at a height of several hundred feet above the sea ...
Pagina 9
... field . worms are much more frequent in some places than in others , without any visible difference in the nature of the soil . They abound in paved court - yards close to houses ; and an instance will be given in which they had ...
... field . worms are much more frequent in some places than in others , without any visible difference in the nature of the soil . They abound in paved court - yards close to houses ; and an instance will be given in which they had ...
Pagina 10
... field ; but they are extremely rare , or quite absent in the drier , brown , fibrous peat , which is so much valued by gardeners . On dry , sandy or gravelly tracks , where heath with some gorse , ferns , coarse grass , moss and lichens ...
... field ; but they are extremely rare , or quite absent in the drier , brown , fibrous peat , which is so much valued by gardeners . On dry , sandy or gravelly tracks , where heath with some gorse , ferns , coarse grass , moss and lichens ...
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.