The Formation of vegetable mould, through the action of worms, with observations on their habitsJ. Murray, 1895 - 328 pagini |
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Pagina 3
... beneath the turf , but still forming a layer . This apparent sinking of superficial bodies is due , as was first suggested to me by Mr. Wedgwood of Maer Hall in Staffordshire , to the large quantity of fine earth continually brought up ...
... beneath the turf , but still forming a layer . This apparent sinking of superficial bodies is due , as was first suggested to me by Mr. Wedgwood of Maer Hall in Staffordshire , to the large quantity of fine earth continually brought up ...
Pagina 11
... Beneath large trees few castings can be found during certain seasons of the year , and this is apparently due to the moisture having been sucked out of the ground by the innu- merable roots of the trees ; for such places may be seen ...
... Beneath large trees few castings can be found during certain seasons of the year , and this is apparently due to the moisture having been sucked out of the ground by the innu- merable roots of the trees ; for such places may be seen ...
Pagina 12
Charles Darwin. Park , where the ground beneath was bare of all vegetation , not a single casting could be found over wide spaces , even during the autumn . Nevertheless , castings were abun dant on some grass - covered glades and in ...
Charles Darwin. Park , where the ground beneath was bare of all vegetation , not a single casting could be found over wide spaces , even during the autumn . Nevertheless , castings were abun dant on some grass - covered glades and in ...
Pagina 15
... beneath the mouths of their burrows . I have occasionally noticed the same fact with worms kept in * De Lumbrici terrestris , & c . , p . 14 . seen . pots in the house ; so that by CHAP . I. WANDER FROM THEIR BURROWS . 15.
... beneath the mouths of their burrows . I have occasionally noticed the same fact with worms kept in * De Lumbrici terrestris , & c . , p . 14 . seen . pots in the house ; so that by CHAP . I. WANDER FROM THEIR BURROWS . 15.
Pagina 22
... beneath water in a saucer , and it instantly withdrew into its burrow . In all cases the duration of the light , unless extremely feeble , made a great difference in the result ; for worms left exposed before a paraffin lamp or a candle ...
... beneath water in a saucer , and it instantly withdrew into its burrow . In all cases the duration of the light , unless extremely feeble , made a great difference in the result ; for worms left exposed before a paraffin lamp or a candle ...
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...