ما يقوله الناس - كتابة مراجعة
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acetic acid achromatic acid angle angular aperture animal animalcules aperture appear arranged axis beautiful become body bone bone-cells calcareous Canada balsam canals cavity cells centre cilia colour composed compound consists covered crystals curious delicate dentine deposited diameter disc distinct Ditto ditto edge enclosed epithelium examined exhibit extremity eye-piece fibres filaments fluid Flustra focus Foraminifera gelatinous glass granules hairs Haversian canals horny illumination inch Infusoria insects instrument larva layer length lens lenses mass matter membrane ment micro microscope minute motion mounted mouth nucleolus nucleus object object-glass observed organs pencil piece placed plants plate polarised light polypes portion prism produced rays refraction resembling round seen shell side siliceous skin slide species specimens spherical aberration spicula spines spiral sponges stage stem structure substance surface teeth tentacles thickness thin tion tissue tourmaline transparent transverse tube vegetable vessels Vorticella Zoophytes
الصفحة 518 - This is dispensed ; and what surmounts the reach Of human sense I shall delineate so, By likening spiritual to corporal forms, As may express them best ; though what if earth Be but the shadow of heaven, and things therein Each to other like, more than on earth is thought...
الصفحة 522 - Contrivance intricate express'd with ease, Where unassisted sight no beauty sees, The shapely limb and lubricated joint, Within the small dimensions of a point, Muscle and nerve miraculously spun, His mighty work who speaks and it is done, The invisible in things scarce seen reveal'd, To whom an atom is an ample field.
الصفحة 329 - All these things live and remain for ever for all uses, and they are all obedient. •• .•- * ' ."..... JIT. All things are double one against another : and he .hath made nothing imperfect.
الصفحة 482 - ... easily employed by the insect in scraping or tearing delicate surfaces. It is by means of this curious structure that the busy House-fly often occasions much mischief to the covers of our books, by scraping off the white of egg and sugar varnish used to give them the polish, leaving traces of its depredations in the soiled and spotted appearance which it occasions on them. It is by means of these also that it teases us in the heat of summer, when it alights on the hand or face, to sip the perspiration...
الصفحة 328 - Consider their incredible numbers, their universal distribution, their insatiable voracity; and that it is the particles of decaying vegetable and animal bodies which they are appointed to devour and assimilate. Surely we must in some degree be indebted to those ever active invisible scavengers for the salubrity of our atmosphere.
الصفحة 366 - ... of the size of an ordinary saucer. The shell, fixed within the stomach, was so placed as to divide it completely into two halves, so that the body, stretched tensely over, had become thin and flattened like a pancake.
الصفحة 546 - Now, each of these pores being the aperture of a little tube of about a quarter of an inch long, it follows that in a square inch of skin on the palm of the hand, there exists a length of tube equal to 882 inches, or 73i feet.
الصفحة 405 - ... invisible. These animals are of a great variety of shapes and sizes, and in such prodigious numbers, that, in a short time, the whole surface of the rock appears to be alive and in motion. The most common...
الصفحة 415 - Confervce, which, when they get at it, grow not merely outside, but even within the lips of the valves, preventing the action of the siphons. In the foot there is a gelatinous spring, or style, which even when taken out has great elasticity, and which seems the mainspring of the motion of the Pholas dactylus.