. The microscope and its revelations. , 74, •«.), on its entrance into theprism, is scarcely subjected to any refrac-tion, since its axial ray is perpendicularto the surface it ,; but within the prism it is subjected to tworeflexions ai // and c, which send it forth again obliquely in the line 11. K. FIG. 73.—Wenhams prism(I860).

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901