The Formation of vegetable mould, through the action of worms, with observations on their habitsJ. Murray, 1895 - 328 pagini |
Din interiorul cărții
Rezultatele 1 - 5 din 25
Pagina 14
... - borne long ago knew . In the morning , after there has been heavy rain , the film of mud or of very fine sand over gravel - walks is often plainly marked with their tracks . I have noticed this 14 CHAP . I. HABITS OF WORMS .
... - borne long ago knew . In the morning , after there has been heavy rain , the film of mud or of very fine sand over gravel - walks is often plainly marked with their tracks . I have noticed this 14 CHAP . I. HABITS OF WORMS .
Pagina 18
... sand and small stones , 1 from the to a little 20 more than the inch in diameter , may generally be found in their gizzards and intestines . As it is certain that worms swal- low many little stones , in- dependently of those swal- lowed ...
... sand and small stones , 1 from the to a little 20 more than the inch in diameter , may generally be found in their gizzards and intestines . As it is certain that worms swal- low many little stones , in- dependently of those swal- lowed ...
Pagina 31
... sand , which was slightly pressed down and well watered , so as to be rendered very compact , and these pieces were never discovered . On a third occasion the same kind of sand was neither pressed down nor watered , and the pieces of ...
... sand , which was slightly pressed down and well watered , so as to be rendered very compact , and these pieces were never discovered . On a third occasion the same kind of sand was neither pressed down nor watered , and the pieces of ...
Pagina 52
... neutralises the intestinai acids . When worms were kept in pots filled M. Foster , ' A Text - Book of Physiology , ' 2nd edit . 1878 p . 243 . with fine ferruginous sand , it was manifest that the 52 CHAP . I HABITS OF WORMS .
... neutralises the intestinai acids . When worms were kept in pots filled M. Foster , ' A Text - Book of Physiology , ' 2nd edit . 1878 p . 243 . with fine ferruginous sand , it was manifest that the 52 CHAP . I HABITS OF WORMS .
Pagina 53
Charles Darwin. with fine ferruginous sand , it was manifest that the oxide of iron , with which the grains of silex were coated , had been dissolved and removed from them in the castings . The digestive fluid of worms resembles in its ...
Charles Darwin. with fine ferruginous sand , it was manifest that the oxide of iron , with which the grains of silex were coated , had been dissolved and removed from them in the castings . The digestive fluid of worms resembles in its ...
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...