The Formation of vegetable mould, through the action of worms, with observations on their habitsJ. Murray, 1895 - 328 pagini |
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Pagina 11
... probably long retains some moisture , is in all cases , as I believe , necessary for their existence ; and the mere compression of the soil appears to be in some degree favourable to them , for they often abound in old gravel walks ...
... probably long retains some moisture , is in all cases , as I believe , necessary for their existence ; and the mere compression of the soil appears to be in some degree favourable to them , for they often abound in old gravel walks ...
Pagina 15
... probably occurs during the two remaining months of the year when they are wet . On these occasions , very few dead worms could anywhere be seen . On January 31 , 1881 , after a long - continued and unusually severe frost with much snow ...
... probably occurs during the two remaining months of the year when they are wet . On these occasions , very few dead worms could anywhere be seen . On January 31 , 1881 , after a long - continued and unusually severe frost with much snow ...
Pagina 29
... probably due to the irritation of their skins . The perception of such unnatural odours would be of no service to worms ; and as such timid creatures would almost certainly exhibit some signs of any CHAP . I. 29 THEIR SENSES .
... probably due to the irritation of their skins . The perception of such unnatural odours would be of no service to worms ; and as such timid creatures would almost certainly exhibit some signs of any CHAP . I. 29 THEIR SENSES .
Pagina 43
... probably from habit . The result is that they are partially digested before they are taken into the alimentary canal . I am not aware of any other case of extra - stomachal digestion having been re- corded . The boa - constrictor bathes ...
... probably from habit . The result is that they are partially digested before they are taken into the alimentary canal . I am not aware of any other case of extra - stomachal digestion having been re- corded . The boa - constrictor bathes ...
Pagina 52
... probably resulted from the humus acids being , as is known to be the case , easily decomposed . Five fresh castings from worms which lived in mould close over the chalk , were of a whitish colour and abounded with calcareous matter ...
... probably resulted from the humus acids being , as is known to be the case , easily decomposed . Five fresh castings from worms which lived in mould close over the chalk , were of a whitish colour and abounded with calcareous matter ...
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...