. The microscope and its revelations. of the micro-spectroscope is to apply the spectroscopic test to very minutequantities of coloured substances ; and it fundamentally consists ofan ordinary eye-piece (which can be fitted into any microscope) withcertain special modifications. As originally devised by Dr. Sorbyand worked out by Mr. Browning, the micro-spectroscope is con-st ructed as follows (fig. 269): Above its eye-glass, which is achro-matic, and made capable of focal adjustment by the milled head, B,there is placed a tube, A, containing a series of five prisms, two offlint glass (fig. 27
. The microscope and its revelations. of the micro-spectroscope is to apply the spectroscopic test to very minutequantities of coloured substances ; and it fundamentally consists ofan ordinary eye-piece (which can be fitted into any microscope) withcertain special modifications. As originally devised by Dr. Sorbyand worked out by Mr. Browning, the micro-spectroscope is con-st ructed as follows (fig. 269): Above its eye-glass, which is achro-matic, and made capable of focal adjustment by the milled head, B,there is placed a tube, A, containing a series of five prisms, two offlint glass (fig. 270, F F) interposed between three of crown(C C C) in such a manner that the emergent rays, r r, which haveseparated by dispersion, leave the prisms in much the same direction as the immergent rayentered it. Below the eye-glass,in the place of the ordinary stop,is a diaphragm with a narrow slitwhich limits the admission of light(fig. 269); this can be adjusted invertical position by the milled , whilst the breadth of the slit is.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
