Elementary chemical microscopy (1921) Elementary chemical microscopy . elementarychemi00cham Year: 1921 ULTRAMICROSCOPES 117 part in the forma- tion of images, although the illu- minating rays in- clude a range of high aperture, to There is thus obtained the greatest brilliancy of image upon the darkest of back- grounds. Although many different ultracon- densers are obtain- able, space forbids a consideration of more than two types: the cardi- oid condenser of Siedentopf as made by Zeiss, and the ultracondenser of Jentzsch as made by Leitz. The Cardioid Ultramicro scope consists of
Elementary chemical microscopy (1921) Elementary chemical microscopy . elementarychemi00cham Year: 1921 ULTRAMICROSCOPES 117 part in the forma- tion of images, although the illu- minating rays in- clude a range of high aperture, to There is thus obtained the greatest brilliancy of image upon the darkest of back- grounds. Although many different ultracon- densers are obtain- able, space forbids a consideration of more than two types: the cardi- oid condenser of Siedentopf as made by Zeiss, and the ultracondenser of Jentzsch as made by Leitz. The Cardioid Ultramicro scope consists of an or- dinary compound microscope M, Fig. 57, into whose sub- stage ring the car- dioid condenser C is introduced and held in place by the clamping screw t. A thin film of Mill ' WPili'lVififliV' > 'I'll11!! ' I'l \V <3» , a. 1
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