The Formation of vegetable mould, through the action of worms, with observations on their habitsJ. Murray, 1895 - 328 pagini |
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Pagina 143
Charles Darwin. A field , which adjoins the one just de- scribed , slopes in one part rather steeply ( viz . , at from ... slope the stones clattered together . I remember doubting whether I should live to see these larger flints covered ...
Charles Darwin. A field , which adjoins the one just de- scribed , slopes in one part rather steeply ( viz . , at from ... slope the stones clattered together . I remember doubting whether I should live to see these larger flints covered ...
Pagina 144
... slope , and the blades of grass were cut off close to the roots , so that the thickness of the turf and of the vegetable mould could be measured accur- ately . The turf was rather less than half an inch , and the mould , which did not ...
... slope , and the blades of grass were cut off close to the roots , so that the thickness of the turf and of the vegetable mould could be measured accur- ately . The turf was rather less than half an inch , and the mould , which did not ...
Pagina 154
... slope . It rested also on fine earth , instead of partly on brick - rubbish . In agreement with this con- clusion , the raised surrounding border of turf was only 1 inch high in some parts , and 2 inches in other parts . There were no ...
... slope . It rested also on fine earth , instead of partly on brick - rubbish . In agreement with this con- clusion , the raised surrounding border of turf was only 1 inch high in some parts , and 2 inches in other parts . There were no ...
Pagina 201
... slopes at an angle of about 3 ° ; and the land appears to have been long cultivated . There- fore no doubt a considerable quantity of fine earth has been washed down from the upper parts of the field , and has largely aided in the ...
... slopes at an angle of about 3 ° ; and the land appears to have been long cultivated . There- fore no doubt a considerable quantity of fine earth has been washed down from the upper parts of the field , and has largely aided in the ...
Pagina 219
... slopes in other parts from west to east , and Mr. Joyce describes one floor as covered at the western end by rubbish and mould to a thickness of 28 inches , and at the eastern end by a thickness of only 11 inches . A very slight slope ...
... slopes in other parts from west to east , and Mr. Joyce describes one floor as covered at the western end by rubbish and mould to a thickness of 28 inches , and at the eastern end by a thickness of only 11 inches . A very slight slope ...
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...