ما يقوله الناس - كتابة مراجعة
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albumen amongst animalcules animals anther apex appears arranged attached bark becn betwecn body bracts branches bundles calyx carpels cavity cell-wall cells cellular tissue central centre cilia cireulation colour common composed compound leaf consists contains corolla Cotyledons creatures Crustacea cuticle deseribed deseription diseovered distinct divided division ealled ealyx elongated embryo endogenous exogenous filaments fleshy flowers fluid furnished genera genus glands growing hairs hilum inclosed instances juice latter layers leaf leaves mass medullary medullary rays membrane microseope midrib minute mode Monogynia mouth Natural organs ovary ovule pair petals petiole pistil pith placed placenta pollen polypes portion possess procecd produced resemblance root secd secn seed segments shell side species spiral vessels stalk stamens stareh stem stomata structure substance surface tentacles termed threc trec tree Triandria tube usually vaseular vegetable veins ventral suture Vorticella whilst whorl wood woody fibre
الصفحة 254 - Fancy an elephant with a number of little elephants sprouting from his shoulders and thighs, bunches of tusked monsters hanging, epaulette-fashion, from his flanks, in every stage of advancement! Here a young pachyderm, almost amorphous; there one more advanced, but all ears and eyes ; on the right shoulder a youthful Chuny, with head, trunk, toes, no legs, and a shapeless body ; on the left, an infant better grown, and struggling to get away, but his tail not sufficiently organized as yet to permit...
الصفحة 140 - There is a peculiar ity in the growth of the Tree Fern — viz., that the interval between the cicatrices enlarges as the size of the tree increases, showing that the stem of the tree increases in height, not only at the apex for the time being, but afterwards in the body of the trunk (Fig. 270). As there is no definite growing point in the sporule, its germination must differ widely from the exogenous and endogenous forms of plants. The sporule, after extrusion...
الصفحة 79 - The inclo-sure of zone within zone is owing to the mode in which the wood is produced, and the position in which it is deposited. Wood is formed by the leaves during the growing season, and passes down towards the root between the bark and the wood of the previous year (if any), or in the position in which...
الصفحة 33 - In a dense forest of Guiana, the Indian chief has stretched his sloping mat between two high stems of the Magnolia, he rests indolently smoking beneath the shade of the broad-leaved Banana, gazing at the doings of his family around. His wife pounds the gathered Mandioc-roots with a wooden club, in the hollowed trunk of a tree, and wraps the thick pulp in a compact net made from the tough leaves of the great Lily-plants. The long bundle is hung upon a stick, which rests on two forks, and a heavy stone...
الصفحة 175 - ... cylinder, of equal diameter at both ends, growing at the point only, containing a loose cellular substance which often disappears ; it is coated by a hard, cellular, fibrous rind, which is much thicker next the root than at the apex, and it is itself composed of the...
الصفحة 33 - Cujete, ) placed beneath. Close by squats a little boy, and dips his father's arrows in the deadly milk, while the wife lights a fire to dry the pressed roots, and by heat to drive off more completely the volatile poisonous matter. Next, it is powdered between two stones, and the Cassavameal is ready. Meanwhile, the boy has completed his evil task ; the sap, after standing some considerable time, has deposited a delicate, white starch, from which the poisonous fluid is poured off. The...
الصفحة 93 - ... which consist of woody tissue, spiral vessels, and cellular tissue, and they are retained in their position and the intervening spaces filled up by cellular tissue. The tissues of the veins are brought in close proximity in the petiole, which is a small stem, and having passed through it into the stem, one part enters the bark, whilst the other traverses the wood and penetrates to the medullary sheath, at the centre of the stem. Thus every leaf is in direct communication with the stem ; and not...
الصفحة 251 - hair,' the unfortunate who has recklessly ventured across the graceful monster's path, too soon writhes in prickly torture. Every struggle but binds the poisonous threads...
الصفحة 184 - ... so abundantly formed in the skin of more complex species, and they multiply by the spontaneous formation in their interior, or upon their surface, of reproductive spheroids called spores.
الصفحة 269 - In this order the body acquires a worm-like form. The radiate structure is in fact scarcely recognisable in these animals, except in the arrangement of the tentacles which surround the mouth. The body is always more or less elongated, with the mouth at one end and the anal opening at the other ; the calcareous deposit in the skin is reduced to scattered granules ; and in one family the ambulacra are entirely wanting.