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 34
Pagina 14
... less than 45 dead worms in one place in a length of sixteen paces . From the facts above given , it is not probable that these worms could have been drowned , and if they had been drowned they would have perished in their burrows . I ...
... less than 45 dead worms in one place in a length of sixteen paces . From the facts above given , it is not probable that these worms could have been drowned , and if they had been drowned they would have perished in their burrows . I ...
Pagina 25
... a small amount of light . Worms appear to be less sensitive to moderate radiant heat than to a bright light . I judge of this from having held at different times a poker heated to dull redness near some worms CHAP . I. 25 THEIR SENSES .
... a small amount of light . Worms appear to be less sensitive to moderate radiant heat than to a bright light . I judge of this from having held at different times a poker heated to dull redness near some worms CHAP . I. 25 THEIR SENSES .
Pagina 27
... on which the pot stood , was accidentally and lightly struck ; but they appeared less sensi- tive to such jars than to the vibrations of the piano ; and their sensitiveness to jars varied much at CHAP . I. 27 THEIR SENSES .
... on which the pot stood , was accidentally and lightly struck ; but they appeared less sensi- tive to such jars than to the vibrations of the piano ; and their sensitiveness to jars varied much at CHAP . I. 27 THEIR SENSES .
Pagina 32
... less gnawed . On two other occasions , how- ever , they seemed to prefer the red . Half- decayed leaves of the red variety and fresh leaves of the green were attacked about equally . When leaves of the cabbage , horse- radish ( a ...
... less gnawed . On two other occasions , how- ever , they seemed to prefer the red . Half- decayed leaves of the red variety and fresh leaves of the green were attacked about equally . When leaves of the cabbage , horse- radish ( a ...
Pagina 39
... less completely their green colour , and their contents finally become brown . The parts thus affected often appeared almost black by reflected light ; but when viewed as a trans- parent CHAP . I. 39 FOOD AND DIGESTION .
... less completely their green colour , and their contents finally become brown . The parts thus affected often appeared almost black by reflected light ; but when viewed as a trans- parent CHAP . I. 39 FOOD AND DIGESTION .
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...