The Formation of Vegetable Mould Through the Action of Worms: With Observations on Their HabitsAppleton, 1892 - 326 pagini |
Din interiorul cărții
Rezultatele 1 - 5 din 32
Pagina 7
... hole . The subject may appear an insignificant one , but we shall see that it possesses some interest ; and the maxim " de minimis lex non curat , " does not apply to science . Even Elie de Beaumont , who generally undervalues small ...
... hole . The subject may appear an insignificant one , but we shall see that it possesses some interest ; and the maxim " de minimis lex non curat , " does not apply to science . Even Elie de Beaumont , who generally undervalues small ...
Pagina 16
... holes an astonishing number of worms ; and this they could not do , unless they lay close to the surface . It is not probable that worms behave in this manner for the sake of breathing fresh air , for we have seen that they can live for ...
... holes an astonishing number of worms ; and this they could not do , unless they lay close to the surface . It is not probable that worms behave in this manner for the sake of breathing fresh air , for we have seen that they can live for ...
Pagina 60
... the worms with their tails fixed in their burrows , dragging the stones inwards by the aid of their mouths , no doubt by suction . " After two nights some of the " holes had 8 or 9 small stones over " 60 CHAP . II . HABITS OF WORMS .
... the worms with their tails fixed in their burrows , dragging the stones inwards by the aid of their mouths , no doubt by suction . " After two nights some of the " holes had 8 or 9 small stones over " 60 CHAP . II . HABITS OF WORMS .
Pagina 61
With Observations on Their Habits Charles Darwin. " holes had 8 or 9 small stones over " them ; after four nights one had about ( 6 30 , and another 34 stones . " * One stone which had been dragged over the gravel - walk to the mouth of ...
With Observations on Their Habits Charles Darwin. " holes had 8 or 9 small stones over " them ; after four nights one had about ( 6 30 , and another 34 stones . " * One stone which had been dragged over the gravel - walk to the mouth of ...
Pagina 64
... hole , with such objects as leaves , petioles or twigs , he would drag or push them in by their pointed ends ; but if these objects were very thin relatively to the size of the hole , he would probably insert some by their thicker or ...
... hole , with such objects as leaves , petioles or twigs , he would drag or push them in by their pointed ends ; but if these objects were very thin relatively to the size of the hole , he would probably insert some by their thicker or ...
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.