The Formation of vegetable mould, through the action of worms, with observations on their habitsJ. Murray, 1895 - 328 pagini |
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Pagina 13
... greater part of their bodies for an hour or two in the early morning . Sick * I shall have occasion often to refer to M. Perrier's admirable memoir , ' Organisation des Lombriciens terrestres ' in Archives de Zoolcg . expér . ' tom ...
... greater part of their bodies for an hour or two in the early morning . Sick * I shall have occasion often to refer to M. Perrier's admirable memoir , ' Organisation des Lombriciens terrestres ' in Archives de Zoolcg . expér . ' tom ...
Pagina 48
... greater number are rounded with an irregu- lar mulberry - like surface . Calciferous cells adhered to many parts of these mulberry - like masses , and their gradual disappearance could be traced while they still remained attached . It ...
... greater number are rounded with an irregu- lar mulberry - like surface . Calciferous cells adhered to many parts of these mulberry - like masses , and their gradual disappearance could be traced while they still remained attached . It ...
Pagina 61
... greater strength in some- times displacing stones in a well - trodden gravel - walk ; that they do so , may be inferred from the cavities left by the displaced stones being exactly filled by those lying over the mouths of adjoining ...
... greater strength in some- times displacing stones in a well - trodden gravel - walk ; that they do so , may be inferred from the cavities left by the displaced stones being exactly filled by those lying over the mouths of adjoining ...
Pagina 105
... greater depth than 6 or 8 inches . On what could these worms have subsisted during this whole time , if not on matter contained in the black earth ? On the other hand , whenever a large number of leaves are drawn into the burrows , the ...
... greater depth than 6 or 8 inches . On what could these worms have subsisted during this whole time , if not on matter contained in the black earth ? On the other hand , whenever a large number of leaves are drawn into the burrows , the ...
Pagina 120
... greater in the deeper parts ( supposing the whole to be equally moistened ) from the greater weight of the superincumbent soil which hast to be raised , than in the parts near the sur- face . When the ground dries , the walls will ...
... greater in the deeper parts ( supposing the whole to be equally moistened ) from the greater weight of the superincumbent soil which hast to be raised , than in the parts near the sur- face . When the ground dries , the walls will ...
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...