. Elementary chemical microscopy . Fig. 38. Chemical Microscope with Stage removed and Auxiliary Stage inserted in the Substage Ring. stage is then inserted in the substage ring, the specimen placed upon it and the focusing is done by means of the substage quick- acting screw. Delicate focusing may then be made by the fine adjustment of the microscope. This method possesses the advantage of producing no disturbance of the alignment of radi- ant and reflector in changing objectives or in studying sue-

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmicroscopy, bookyear1