Elementary chemical microscopy (1921) Elementary chemical microscopy . elementarychemi00cham Year: 1921 MICROSPECTROSCOPE 133 (iiiiiiiiiiiiiiiiiiiii) Fig. 67. Microspectroscope. arrangement of the glass prisms, three low and two high, that the deviation of the system will be the difference between the devia- tions produced by the crown and flint prisms. The net result is that for rays of medium wave length (yellow-green) the path of the emerging rays lies substantially in the same line as that of the

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