The Formation of vegetable mould, through the action of worms, with observations on their habitsJ. Murray, 1895 - 328 pagini |
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Pagina 67
... apex than towards . the base . This proved to be the case with those of a laburnum ( a hybrid between Cytisus alpinus and laburnum ) for on doubling the terminal over the basal half , they gene- rally fitted exactly ; and when there was ...
... apex than towards . the base . This proved to be the case with those of a laburnum ( a hybrid between Cytisus alpinus and laburnum ) for on doubling the terminal over the basal half , they gene- rally fitted exactly ; and when there was ...
Pagina 69
... 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 . Out of 28 fallen leaves on ...
... 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 . Out of 28 fallen leaves on ...
Pagina 70
... apex , will dry more quickly than the end embedded in the damp ground ; and the exposed margins of the free end will consequently tend to become more curled inwards than they were when the leaf was first seized by the worm . My son ...
... apex , will dry more quickly than the end embedded in the damp ground ; and the exposed margins of the free end will consequently tend to become more curled inwards than they were when the leaf was first seized by the worm . My son ...
Pagina 71
... apex , the other would be pressed against the ground and would resist the entry of the seized one . This was manifest in the above mentioned two or three excep- tional cases . In order , therefore that worms should do their work well ...
... apex , the other would be pressed against the ground and would resist the entry of the seized one . This was manifest in the above mentioned two or three excep- tional cases . In order , therefore that worms should do their work well ...
Pagina 76
... apex would have been preferred . But the result was that out of 121 leaves with the tips cemented , which were drawn into bur- rows , 108 were drawn in by their bases , and only 13 by their tips . Thinking that the worms might possibly ...
... apex would have been preferred . But the result was that out of 121 leaves with the tips cemented , which were drawn into bur- rows , 108 were drawn in by their bases , and only 13 by their tips . Thinking that the worms might possibly ...
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...