The Formation of vegetable mould, through the action of worms, with observations on their habitsJ. Murray, 1895 - 328 pagini |
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Pagina 43
... alimentary canal . I am not aware of any other case of extra - stomachal digestion having been re- corded . The boa - constrictor bathes its prey with saliva , but this is solely for lubricating it . Perhaps the nearest analogy may be ...
... alimentary canal . I am not aware of any other case of extra - stomachal digestion having been re- corded . The boa - constrictor bathes its prey with saliva , but this is solely for lubricating it . Perhaps the nearest analogy may be ...
Pagina 44
Charles Darwin. earth - worm debouch into the alimentary canal in advance of the gizzard , but pos- teriorly to it in Urochtæa and some other genera . * The two posterior pairs are formed by lamellæ , which according to Claparède , are ...
Charles Darwin. earth - worm debouch into the alimentary canal in advance of the gizzard , but pos- teriorly to it in Urochtæa and some other genera . * The two posterior pairs are formed by lamellæ , which according to Claparède , are ...
Pagina 50
... alimentary canal for some special purpose . On the other hand , the following considera- tions render it highly probable that the carbonate of lime , which is excreted by the glands , aids the digestive process under ordinary ...
... alimentary canal for some special purpose . On the other hand , the following considera- tions render it highly probable that the carbonate of lime , which is excreted by the glands , aids the digestive process under ordinary ...
Pagina 51
... alimentary canal were found to be plainly acid , as shown by litmus paper . This acidity cannot be attributed to the nature of the digestive fluid , for pancreatic fluid is alkaline ; and we have seen that the secretion which is poured ...
... alimentary canal were found to be plainly acid , as shown by litmus paper . This acidity cannot be attributed to the nature of the digestive fluid , for pancreatic fluid is alkaline ; and we have seen that the secretion which is poured ...
Pagina 53
... alimentary canal of worms , serve to neutralise more or less completely the acids there generated by the half - decayed leaves . We have seen that these cells are instantly dissolved by a small quantity of acetic acid , and as they do ...
... alimentary canal of worms , serve to neutralise more or less completely the acids there generated by the half - decayed leaves . We have seen that these cells are instantly dissolved by a small quantity of acetic acid , and as they do ...
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...