The Formation of vegetable mould, through the action of worms, with observations on their habitsJ. Murray, 1895 - 328 pagini |
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Pagina 64
... middle parts . It seemed more espe- eially desirable to do this in the case of plants not natives to our country ; for although the habit of dragging leaves into their burrows is undoubtedly instinctive with worms , yet instinct could ...
... middle parts . It seemed more espe- eially desirable to do this in the case of plants not natives to our country ; for although the habit of dragging leaves into their burrows is undoubtedly instinctive with worms , yet instinct could ...
Pagina 65
... middle was seized . If both these alternatives are ex- cluded , intelligence alone is left ; unless the worm in each case first tries many different methods , and follows that alone which proves possible or the most easy ; but to act ...
... middle was seized . If both these alternatives are ex- cluded , intelligence alone is left ; unless the worm in each case first tries many different methods , and follows that alone which proves possible or the most easy ; but to act ...
Pagina 66
... middle . These proportions agree very closely , as far as the tip is con- cerned , with those before given . But the per- centage drawn in by the base is smaller , which may be attributed to the breadth of the basal part of the blade ...
... middle . These proportions agree very closely , as far as the tip is con- cerned , with those before given . But the per- centage drawn in by the base is smaller , which may be attributed to the breadth of the basal part of the blade ...
Pagina 67
... middle , and of some few having been drawn in by the base , renders it improbable that the worms first tried to draw in most of the leaves by one or both of these methods , and that they after- wards drew in 79 per cent . by their tips ...
... middle , and of some few having been drawn in by the base , renders it improbable that the worms first tried to draw in most of the leaves by one or both of these methods , and that they after- wards drew in 79 per cent . by their tips ...
Pagina 72
... cut - off ends . The worms in confinement often seized the needles near the middle and drew them to- wards the mouths of their burrows ; and one worm tried in a senseless manner to drag them into 72 CHAP . II . HABITS OF WORMS .
... cut - off ends . The worms in confinement often seized the needles near the middle and drew them to- wards the mouths of their burrows ; and one worm tried in a senseless manner to drag them into 72 CHAP . II . HABITS OF WORMS .
Alte ediții - Afișează-le pe toate
Darwin on Humus and the Earthworm: The Formation of Vegetable Mould Through ... Charles Darwin Vizualizare fragmente - 1966 |
Termeni și expresii frecvente
9 inches accumulated acetic acid acid action of worms alimentary canal amount angles animals apex apical appears basal base Beaulieu Abbey beneath the surface broken buried burnt marl burrows cent chalk cinders close concrete covered depth diameter disintegration dragged drawn earth feet field flints floor formed fragments gizzards glands grass ground heavy rain Hensen holes hypocausts Illustrations inches beneath inches deep inches in length inches in thickness inches thick intestines Joyce Knole Park lamellæ land large number larvæ layer leaf leaves Leith Hill Place lime Maer Hall manner matter mortar mouths nearly northern room objects observed particles pasture pavement penetrated petioles pharynx pine-leaves 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 undisturbed upper vegetable mould walls washed weather weight whilst worm-castings worms
Pasaje populare
Pagina 322 - OUTINGS AT ODD TIMES. By CHARLES C. ABBOTT, author of " Days out of Doors " and " A Naturalist's Rambles about Home." i6mo. Cloth, gilt top, $1.25. " A charming little volume, literally alone with Nature, for it discusses seasons and the fields, birds, etc., with the loving freedom of a naturalist born. Every page reads like a sylvan poem; and for the lovers of the beautiful in quiet...