The Formation of vegetable mould, through the action of worms, with observations on their habitsJ. Murray, 1895 - 328 pagini |
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Pagina 44
... consisting of these free cells . They are minute , and vary in diameter from 2 to 6 μ . They contain in their centres a little excessively fine granular matter ; but they look so like oil globules that Claparède and others at first ...
... consisting of these free cells . They are minute , and vary in diameter from 2 to 6 μ . They contain in their centres a little excessively fine granular matter ; but they look so like oil globules that Claparède and others at first ...
Pagina 66
... consisted of the fallen leaves of the common lime - tree , which is almost certainly not a native of England . These leaves are much acumin- ated towards the tip , and are very broad at the base with a well - developed foot - stalk ...
... consisted of the fallen leaves of the common lime - tree , which is almost certainly not a native of England . These leaves are much acumin- ated towards the tip , and are very broad at the base with a well - developed foot - stalk ...
Pagina 90
... of blade often narrower than the apical part . 34 of Pine - trees , consisting of two needles arising from a com- mon base " : 17 17 4 10 27 26 66 100 Drawn into the Nature of Object . Drawn burrows , 90 CHAP . II . HABITS OF WORMS .
... of blade often narrower than the apical part . 34 of Pine - trees , consisting of two needles arising from a com- mon base " : 17 17 4 10 27 26 66 100 Drawn into the Nature of Object . Drawn burrows , 90 CHAP . II . HABITS OF WORMS .
Pagina 100
... consisted partly of the reddish sand and partly of black earth brought up from beneath the mass . This sand had been dug up from a considerable depth , and was of so poor a nature that 100 CHAP . II , HABITS OF WORMS .
... consisted partly of the reddish sand and partly of black earth brought up from beneath the mass . This sand had been dug up from a considerable depth , and was of so poor a nature that 100 CHAP . II , HABITS OF WORMS .
Pagina 101
... consisted of grains of quartz , micaceous slate , other rocks , and bricks or tiles , many of them from to inch in diameter . No one will suppose that these grains were swallowed as food , yet they formed more than half of the casting ...
... consisted of grains of quartz , micaceous slate , other rocks , and bricks or tiles , many of them from to inch in diameter . No one will suppose that these grains were swallowed as food , yet they formed more than half of the casting ...
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...