The Microscope: Its History, Construction, and Applications: Being a Familiar Introduction to the Use of the Instrument, and the Study of Microsopical ScienceG. Routledge, 1886 - 764 pages |
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acetic acid achromatic acid angle animal animalcules Annelids aperture appear arrangement axis beautiful become blood body bone bone-cells calcareous Canada balsam cavity cells centre cilia colour composed condenser consists covered crystals delicate deposited diameter diatoms disc edge eggs examination exhibit eye-piece fibres filaments fluid focus Foraminifera genus glass glycerine granules hairs Haversian canals horny illumination immersion inch Infusoria insects instrument larvæ layer length lens lenses lines magnified mass matter membrane micro microscope microscopist minute motion mounted muscular nucleolus nucleus object object-glass oblique observed obtained opaque organs picric acid placed plants Plate polarised light polype portion prism produced protoplasm rays refraction resembling scales screw seen shell side slide solution species specimens spherical aberration spicula spiral sponge spores stage stained structure substance surface teeth tentacles thickness thin tion tissue transparent transverse tube vegetable vessels Volvox Vorticella zoospores
Popular passages
Page 425 - These beds are covered by others of a peculiar soft white stone, including much gypsum, and resembling chalk, but really of a pumiceous nature. It is highly remarkable, from being composed, to at least one-tenth of its bulk, of Infusoria.
Page 437 - 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.
Page 482 - Besides these forms imitating vegetation, there are gracefully-modelled vases, some of which are three or four feet in diameter, made up of a network of branches and branchlets and sprigs of flowers. There are also solid coral hemispheres like domes among the vases and shrubbery, occasionally ten or even twenty feet in diameter, whose symmetrical surface is gorgeously decked with polype-stars of purple and emerald green.
Page 436 - 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.
Page 143 - ... the first effect is the production of the yellow or cinnamon-coloured compound of iodine and quinine, which forms as a small circular spot ; the alcohol separates in little drops, which by a sort of repulsive movement drive the fluid away ; after a time the acid liquid again flows over the spot, and the polarizing crystals of sulphate of iodo-quinine are slowly produced in beautiful rosettes. This succeeds best without the aid of heat.
Page 118 - Below the prism is an achromatic eyepiece, having an adjustable slit between the two lenses ; the upper lens being furnished with a screw motion to focus the slit. A side slit capable of adjustment admits when required a second beam of light from any object whose spectrum it is desired to compare with that of the object placed on the stage of the microscope. This second beam of light strikes against a very small prism, suitably placed inside the apparatus, and is reflected up through the compound...
Page 500 - Sea-cucumbers." — In this family the body acquires a slug-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. The integument consists of a number of minute reticulated plates,...
Page 381 - ... together in a glass of sea-water, with their orifices opposite to each other, at the distance of two inches; they appeared to the naked eye like two living batteries, and soon covered each other with feculent matter.
Page 731 - Has any seen The mighty chain of beings, lessening down From Infinite Perfection to the brink Of dreary nothing, desolate abyss ! From which astonish'd thought, recoiling, turns ? Till then alone let zealous praise ascend, And hymns of holy wonder, to that POWER, Whose wisdom shines as lovely on our minds, As on our smiling eyes his servant-sun.
Page 126 - If we transmit a beam of the sun's light through a circular aperture into a darkened room, and if we reflect it from any crystallised or uncrystallised body, or transmit it through a thin plate of either of them, it will be reflected and transmitted in the very same manner, and with the same intensity, whether the surface of the body is held above or below the beam, or on the right...