The Formation of vegetable mould, through the action of worms, with observations on their habitsJ. Murray, 1895 - 328 pagini |
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Pagina 14
... sometimes be seen lying on the ground . Mr. Galton informs me that on one such occasion ( March , 1881 ) , the dead worms averaged one for every two and a half paces in length on a walk in Hyde Park , four paces in width . He counted no ...
... sometimes be seen lying on the ground . Mr. Galton informs me that on one such occasion ( March , 1881 ) , the dead worms averaged one for every two and a half paces in length on a walk in Hyde Park , four paces in width . He counted no ...
Pagina 15
... sometimes be traced either to or from the mouths of the burrows in the gravel - walks , for distances between 2 or 3 up to 15 yards . I have never seen two tracks leading to the same burrow ; nor is it likely , from what we shall ...
... sometimes be traced either to or from the mouths of the burrows in the gravel - walks , for distances between 2 or 3 up to 15 yards . I have never seen two tracks leading to the same burrow ; nor is it likely , from what we shall ...
Pagina 28
... sometimes perceived the eddies in the air caused by quickly removing the glass plates . When a worm first comes out of its burrow , it generally moves the much ex- tended anterior extremity of its body from side to side in all ...
... sometimes perceived the eddies in the air caused by quickly removing the glass plates . When a worm first comes out of its burrow , it generally moves the much ex- tended anterior extremity of its body from side to side in all ...
Pagina 34
... sometimes lie in contact . According to Hoffmeister they pass the winter either singly or rolled up with others into a ball at the bottom of their burrows . * Although worms are so remark- ably deficient in the several sense - organs ...
... sometimes lie in contact . According to Hoffmeister they pass the winter either singly or rolled up with others into a ball at the bottom of their burrows . * Although worms are so remark- ably deficient in the several sense - organs ...
Pagina 42
... Sometimes the starch was dissolved out of only one of the two guard - cells . The nucleus in one case had disappeared , together with the starch - granules . The mere burying of lime - leaves in damp earth for nine days did not cause ...
... Sometimes the starch was dissolved out of only one of the two guard - cells . The nucleus in one case had disappeared , together with the starch - granules . The mere burying of lime - leaves in damp earth for nine days did not cause ...
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...