The Formation of vegetable mould, through the action of worms, with observations on their habitsJ. Murray, 1895 - 328 pagini |
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Pagina 65
... base or 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 ...
... base or 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 ...
Pagina 66
... base with a well - developed foot - stalk . They are thin and quite flexible when half- withered . Of the 70 , 79 per cent . had been drawn in by or near the tip ; 4 per cent , by or near the base ; and 17 per cent . trans- versely or ...
... base with a well - developed foot - stalk . They are thin and quite flexible when half- withered . Of the 70 , 79 per cent . had been drawn in by or near the tip ; 4 per cent , by or near the base ; and 17 per cent . trans- versely or ...
Pagina 67
... base , renders it improbable that the worms first tried to draw in most of the leaves by one or both of these ... base or middle . The leaves of a foreign plant were next searched for , the blades of which were not more pointed towards ...
... base , renders it improbable that the worms first tried to draw in most of the leaves by one or both of these ... base or middle . The leaves of a foreign plant were next searched for , the blades of which were not more pointed towards ...
Pagina 68
... base , and 10 per cent . transversely . We here see that a far larger proportion , viz . , 27 per cent . were drawn in by the base than in the case of lime leaves , the blades of which are very broad at the base , and of which only 4 ...
... base , and 10 per cent . transversely . We here see that a far larger proportion , viz . , 27 per cent . were drawn in by the base than in the case of lime leaves , the blades of which are very broad at the base , and of which only 4 ...
Pagina 69
... base and others to- wards the apex . After they have fallen off , the blade on each side of the midrib often becomes curled up while drying , sometimes along the whole length , sometimes chiefly at the base , sometimes towards the apex ...
... base and others to- wards the apex . After they have fallen off , the blade on each side of the midrib often becomes curled up while drying , sometimes along the whole length , sometimes chiefly at the base , sometimes towards the apex ...
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...