The Formation of Vegetable Mould Through the Action of Worms: With Observations on Their HabitsAppleton, 1892 - 326 pagini |
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Pagina 7
... Means by which they excavate their burrows , by pushing away the earth and swallowing it - Earth also swallowed for the nutritious matter which it contains - Depth to which worms burrow , and the construction of their burrows - Burrows ...
... Means by which they excavate their burrows , by pushing away the earth and swallowing it - Earth also swallowed for the nutritious matter which it contains - Depth to which worms burrow , and the construction of their burrows - Burrows ...
Pagina 19
... means an extensive absorbent surface is gained . 8 The circulatory system is well developed . Worms breathe by their skin , as they do not possess any special respiratory organs . The two sexes are united in the same individual , but ...
... means an extensive absorbent surface is gained . 8 The circulatory system is well developed . Worms breathe by their skin , as they do not possess any special respiratory organs . The two sexes are united in the same individual , but ...
Pagina 20
... means . * Hoffmeister , however , states † that worms , with the exception of a few individuals , are extremely sensitive to light ; but he admits that in most cases a certain time is requisite for its action . These statements led me ...
... means . * Hoffmeister , however , states † that worms , with the exception of a few individuals , are extremely sensitive to light ; but he admits that in most cases a certain time is requisite for its action . These statements led me ...
Pagina 21
... was con- centrated by means of a large lens on the anterior extremity , they generally withdrew instantly ; but this concentrated light failed to act perhaps once out of half a dozen trials СНАР . І. 21 THEIR SENSES .
... was con- centrated by means of a large lens on the anterior extremity , they generally withdrew instantly ; but this concentrated light failed to act perhaps once out of half a dozen trials СНАР . І. 21 THEIR SENSES .
Pagina 31
... were discovered and re- moved after the second night . These several facts indicate that worms possess some power of smell ; and that they discover by this means odoriferous and much - coveted kinds of food . CHAP . I. 31 THEIR SENSES .
... were discovered and re- moved after the second night . These several facts indicate that worms possess some power of smell ; and that they discover by this means odoriferous and much - coveted kinds of food . CHAP . I. 31 THEIR SENSES .
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.