Popular cyclopaedia of natural science (by W.B. Carpenter).Society for the Promotion of Popular Instruction, 1841 |
Részletek a könyvből
1 - 5 találat összesen 29 találatból.
55. oldal
... tubes that constitute the external sheath of the spiral vessels , which have been mentioned as existing in the leaf - stalk ; and thus we are able to separate these vessels into the two other elements , mem- brane and fibre . These very ...
... tubes that constitute the external sheath of the spiral vessels , which have been mentioned as existing in the leaf - stalk ; and thus we are able to separate these vessels into the two other elements , mem- brane and fibre . These very ...
56. oldal
... tubes through which air is to pass , and the preventing these from being pressed together by the growth of neighbouring parts . Not unfrequently , however , it seems less elastic than usual , and is broken during the processes of growth ...
... tubes through which air is to pass , and the preventing these from being pressed together by the growth of neighbouring parts . Not unfrequently , however , it seems less elastic than usual , and is broken during the processes of growth ...
60. oldal
... tube , tapering to a point at each end . It thus resembles a greatly of Woody elongated cell . It differs from cellular tissue of similar Fibre . form , in the much greater strength of the membrane forming the walls of the tubes ...
... tube , tapering to a point at each end . It thus resembles a greatly of Woody elongated cell . It differs from cellular tissue of similar Fibre . form , in the much greater strength of the membrane forming the walls of the tubes ...
61. oldal
... tubes ; and it is in the presence or absence of these that the difference exists between the heart - wood and sap - wood of a trunk . The woody tubes of the former are entirely choked up with the hard matter deposited in their cavities ...
... tubes ; and it is in the presence or absence of these that the difference exists between the heart - wood and sap - wood of a trunk . The woody tubes of the former are entirely choked up with the hard matter deposited in their cavities ...
62. oldal
... tubes from one ex- tremity to the other . This fibre is not always to be traced , however , with the same regularity ... tubes Portions of Spiral in their perfect state contain air only , which finds Vessels ; a , com- its way from one ...
... tubes from one ex- tremity to the other . This fibre is not always to be traced , however , with the same regularity ... tubes Portions of Spiral in their perfect state contain air only , which finds Vessels ; a , com- its way from one ...
Gyakori szavak és kifejezések
absorbed absorption Algæ ammonia amount animal appear atmosphere bark beneath branches buds bundles calyx carbonic acid carpels cells cellular tissue character colour common commonly consists contained cotyledons Cryptogamia curious cuticle decay deposited developed ducts Endogens exhalation exist Exogens exposed Ferns fleshy flower Flowering Plants fluid Fungi gallic acid germination germs grow growth heat influence instances interior intumescence juice kind large quantity layers leaf leafy leaves Lichens light Liverworts manner manure matter medullary rays membrane midrib minute mode moisture nature nearly nourishment nutritious obtained organs ovarium ovules oxygen peculiar petals petiole pith plants portion produced proportion regarded resembling roots scarcely seed seen sepals separated side similar soft soil sometimes species spiral vessels stamens starch stem stoma stomata structure substance supply surface takes place tendency termed tion trees tribe trunk tubes usually vegetable veins whilst whole wood woody fibre
Népszerű szakaszok
31. oldal - ... though the whole plant was not larger than the top of one of my fingers, I could not contemplate the delicate conformation of its roots, leaves, and capsula, without admiration. Can that Being (thought I) who planted, watered, and brought to perfection, in this obscure part of the world, a thing which appears of so small importance, look with unconcern upon the situation and sufferings of creatures formed after His own image ? — surely not ! Reflections like these would not allow me to despair.
30. oldal - I turned, nothing appeared but danger and difficulty. I saw myself in the midst of a vast wilderness, in the depth of the rainy season, naked and alone, surrounded by savage animals, and men still more savage. I was five hundred miles from the nearest European settlement. All these circumstances crowded at once on my recollection, and I confess that my spirits began to fail me.
30. oldal - I mention this to show from what trifling circumstances the mind will sometimes derive consolation ; for though the whole plant was not larger than the top of one of my fingers, I could not contemplate the delicate conformation of its roots, leaves, and capsula without admiration. Can that Being, thought I, who planted, watered, and brought to perfection, in this obscure part of the world, a thing which appears of so small importance, look with unconcern upon the situation and sufferings of creatures...
103. oldal - The fig-tree ; not that kind for fruit renown'd, But such as at this day, to Indians known, In Malabar or Decan spreads her arms Branching so broad and long, that in the ground The bended twigs take root, and daughters grow About the mother tree, a pillar'd shade High over-arch'd, and echoing walks between...
187. oldal - The leaves, during this period, had expanded to their full size, but were almost white. One forenoon the sun began to shine in full brightness. " The colour of the forest absolutely changed so fast that we could perceive its progress. By the middle of the afternoon the whole of these extensive forests, many miles in length, presented their usual summer dress.
30. oldal - I sat for some time, looking around me with amazement and terror. Whichever way I turned, nothing appeared but danger and difficulty. I saw myself in the midst of a vast wilderness, in the depth of the rainy season; naked and alone; surrounded by savage animals, and men still more savage. I was five hundred miles from the nearest European settlement. All these circumstances crowded at once...
278. oldal - I have now before me," he says, " three plants of Raspberries, which have been raised in the gardens of the Horticultural Society, from seeds taken from the stomach of a man whose skeleton was found thirty feet below the surface of the earth, at the bottom of a burrow which was opened near Dorchester.
179. oldal - ... of the tissues of every plant is solid carbon, and that too, derived chiefly from the atmosphere, it is evident that much more carbonic acid is, o"n the whole, consumed by vegetation than is evolved. In accordance with this are the results of the experiments of Dr. Daubeny...
36. oldal - And spread th' enduring foliage ; — then we trace The freckled flower upon the flinty base ; These all increase, till in unnoticed years The stony tower as grey with age appears ; With coats of vegetation, thinly spread, Coat above coat, the living on the dead : These then dissolve to dust, and make a way For bolder foliage, nursed by their decay : The long-enduring Ferns in time will all Die and depose their dust upon the wall ; Where the wing'd seed may rest, till many a flower Show Flora's triumph...
44. oldal - The number of sporules which any one fungus may develope is almost incalculable; a single individual of the " puff-ball" tribe, has been computed to send forth no fewer than ten millions. And their minuteness is such that they are scattered through the air in the finest possible dust, so that it is difficult to conceive of a place from which they should be excluded.