The Formation of vegetable mould, through the action of worms, with observations on their habitsJ. Murray, 1895 - 328 pagini |
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Pagina 17
... lower part there are three pairs of large glands , which secrete a surprising amount of carbonate of lime . These calciferous glands are highly remark- able , for nothing like them is known in any other animal . Their use will be ...
... lower part there are three pairs of large glands , which secrete a surprising amount of carbonate of lime . These calciferous glands are highly remark- able , for nothing like them is known in any other animal . Their use will be ...
Pagina 56
... lower lip ; the thick and strong pharynx being at the same time , as Perrier remarks , pushed forward within their bodies , so as to afford a point of resistance for the upper lip . In the case of broad flat objects they acted in a ...
... lower lip ; the thick and strong pharynx being at the same time , as Perrier remarks , pushed forward within their bodies , so as to afford a point of resistance for the upper lip . In the case of broad flat objects they acted in a ...
Pagina 98
... lower animals to justify our natural dis- trust of such a conclusion . With respect to the small size of the cerebral ganglia , we should remember what a mass of inherited knowledge , with some power of adapting means to an end , is ...
... lower animals to justify our natural dis- trust of such a conclusion . With respect to the small size of the cerebral ganglia , we should remember what a mass of inherited knowledge , with some power of adapting means to an end , is ...
Pagina 138
... lower parts , and thus forms a roof , which sooner or later falls in , as in the above mentioned five cases . The downward movement of the clay may be com- pared with that of a glacier , but is incomparably slower ; and this movement ...
... lower parts , and thus forms a roof , which sooner or later falls in , as in the above mentioned five cases . The downward movement of the clay may be com- pared with that of a glacier , but is incomparably slower ; and this movement ...
Pagina 148
... lower side ; for , as Hensen re- marks , they like the shelter of stones . As soon as the hollows are filled up , the worms eject the earth which they have swallowed beyond the circumference of the stones ; and thus the surface of the ...
... lower side ; for , as Hensen re- marks , they like the shelter of stones . As soon as the hollows are filled up , the worms eject the earth which they have swallowed beyond the circumference of the stones ; and thus the surface of the ...
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...