The Formation of vegetable mould, through the action of worms, with observations on their habitsJ. Murray, 1895 - 328 pagini |
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Pagina 2
... doubt is of the highest antiquity , yet in regard to its permanence , we shall here- after see reason to believe that its component particles are in most cases removed at not a very slow rate , and are replaced by others due to the ...
... doubt is of the highest antiquity , yet in regard to its permanence , we shall here- after see reason to believe that its component particles are in most cases removed at not a very slow rate , and are replaced by others due to the ...
Pagina 21
... doubt whether this was really the case , for on two occasions after withdrawing slowly , they remained for a long time with their anterior extremities protruding a little from the mouths of their burrows , in which position they were ...
... doubt whether this was really the case , for on two occasions after withdrawing slowly , they remained for a long time with their anterior extremities protruding a little from the mouths of their burrows , in which position they were ...
Pagina 25
... doubt the justice of the comparison . Although worms cannot be said to possess the power of vision , their sensitiveness to light enables them to distinguish between day and night ; and they thus escape extreme danger from the many ...
... doubt the justice of the comparison . Although worms cannot be said to possess the power of vision , their sensitiveness to light enables them to distinguish between day and night ; and they thus escape extreme danger from the many ...
Pagina 36
... doubt whether the starch was used as food . Pieces of raw and roasted meat were fixed several times by long pins to the surface of the soil in my pots , and night after night the worms could be seen tugging at them , with the edges of ...
... doubt whether the starch was used as food . Pieces of raw and roasted meat were fixed several times by long pins to the surface of the soil in my pots , and night after night the worms could be seen tugging at them , with the edges of ...
Pagina 60
... 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 .
... 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 .
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...