Scientific amusements . mmense instrument is a refractor. The Microscope has been also attributed to ZachariasJansen, and Drebbel, in 1619, possessed, the instrumentin London, but it was of little or no use. The lensinvented by Hall, as already mentioned, gave an impetusto the Microscope. In the simple Microscope the objectsare seen directly through the lens or lenses acting as compound instrument is composed of two lenses (or THE MICROSCOPE. 123 a number formed to do duty as two), an eye-lens, and anobject-lens. Between these is a stop to restrain alllight, except what is necessary to
Scientific amusements . mmense instrument is a refractor. The Microscope has been also attributed to ZachariasJansen, and Drebbel, in 1619, possessed, the instrumentin London, but it was of little or no use. The lensinvented by Hall, as already mentioned, gave an impetusto the Microscope. In the simple Microscope the objectsare seen directly through the lens or lenses acting as compound instrument is composed of two lenses (or THE MICROSCOPE. 123 a number formed to do duty as two), an eye-lens, and anobject-lens. Between these is a stop to restrain alllight, except what is necessary to view the object large glass near the object bends the rays on to theeyeglass, and a perfect magnified image is perceived. Weannex diagrams, from which, the construction will be readilyunderstood. We have in the previous chaptermentioned the effect of light upon theeye and its direction, and when anobject is placed very near the eye weknow it cannot be distinctly seen ; amagnified image is thrown upon the.
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Keywords: ., bookcentury1800, bookdecade189, booksubjectscientificrecreations
