The Microscope: Its History, Construction, and Applications: Being a Familiar Introduction to the Use of the Instrument, and the Study of Microsopical Science

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G. Routledge, 1886 - 764 pages
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Page 490 - 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 445 - 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 615 - 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...
Page 388 - ... around. The beauty and novelty of such a scene in the animal kingdom, long arrested my attention, but after twenty-five minutes of constant observation, I was obliged to withdraw my eye from fatigue, without having seen the torrent for one instant change its direction, or diminish, in the slightest degree, the rapidity of its course.
Page 444 - 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 379 - Moldau, and in a specimen of serpentine limestone sent to Sir C. Lyell by Dr. Giimbel, of Bavaria, all these being parts of the great formation of " fundamental " gneiss, which is considered by Sir Roderick Murchison as the equivalent of the Laurentian rocks of Canada.
Page 151 - ... 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 126 - 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 444 - ... matter upon the earth ; for when this matter is dissolved or suspended in water, in that state of comminution and decay which immediately precedes its final decomposition into the elementary gases, and its consequent return from the organic to the inorganic world, these wakeful members of nature's invisible police are everywhere ready to arrest the fugitive organised particles and turn them back into the ascending stream of animal life.
Page 134 - A section of such a beam of light will be a circle, like ab ed, fig. 79 ; and we shall distinguish the section of a beam of common light by a circle with two diameters ab, cd, at right angles to each other. If we now allow the same beam of light to fall upon a rhomb of Iceland spar, and examine the two circular beams...

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