Principles and practice of operative dentistry . Pointed eye-glass. Eve-glass. Such aids to the critical examination of the teeth are indispensable tothe careful operator. The magnifying lens may be employed in two ways, either to directlymagnify the parts which are in the direct line of vision, or by magnifyingthe image obtained of obscure parts hy reflection upon the surface of theplane mirror. The enlarged image obtained in this manner is more sharplydefined than that obtained by the concave mirror. The clouding of the

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectdentist, bookyear1920