. Machinery and processes of the industrial arts, and apparatus of the exact sciences. Double Nachets Triple Microscope. practical value to the double microscope when used for purposes ofinstruction; and to those who observe merely for the satisfaction of curi- 544 PAEIS UNIVERSAL EXPOSITION. osity they add very niuch to the interest of the observation, and theattending gratification. These remarks are still more applicable tothe triple and quadruple forms of the instrument constructed by thesame ingenious maker. The triple microscope of Mr. Xachet, as exhib-ited in the Exposition
. Machinery and processes of the industrial arts, and apparatus of the exact sciences. Double Nachets Triple Microscope. practical value to the double microscope when used for purposes ofinstruction; and to those who observe merely for the satisfaction of curi- 544 PAEIS UNIVERSAL EXPOSITION. osity they add very niuch to the interest of the observation, and theattending gratification. These remarks are still more applicable tothe triple and quadruple forms of the instrument constructed by thesame ingenious maker. The triple microscope of Mr. Xachet, as exhib-ited in the Exposition, is represented in Fig. 114. The beam of lightfrom the objective is here divided into three equal parts by a com-bination of prisms of suitable form, each portion being reflected intoa separate tube. As the eyes of different observers require differentadjustments, each one of these tubes has a sliding tube within it, bymeans of which a large movement may be given to the eye-piece, per-mitting it to be adjusted separately to the point of most distinct vision;while a preliminary general adjustment for
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Keywords: ., bookcentury1800, booksubjectmachinery, booksubjectscientificappa
