. Machinery and processes of the industrial arts, and apparatus of the exact sciences. Mr. Nachet exhibited in the Exposition a binocular dissecting micro-scope of a neat and compact form; and another still simpler was exhib-ited by Mr. J. Beck. The division for purposes of binocularvision of the compound pencil of lightproceeding from the objective, suggestsnaturally the adaptation of the instru-ment to the use of two observers simul-taneously. A double microscope con-structed on this principle by Mr. Cachetis represented in the accompanying fig-ure. It is obvious that, after the divisionof t
. Machinery and processes of the industrial arts, and apparatus of the exact sciences. Mr. Nachet exhibited in the Exposition a binocular dissecting micro-scope of a neat and compact form; and another still simpler was exhib-ited by Mr. J. Beck. The division for purposes of binocularvision of the compound pencil of lightproceeding from the objective, suggestsnaturally the adaptation of the instru-ment to the use of two observers simul-taneously. A double microscope con-structed on this principle by Mr. Cachetis represented in the accompanying fig-ure. It is obvious that, after the divisionof the beam, it is only a matter of mechan-ical detail to give to the parts any direc-tion which may be found most conven-ient. For purposes of demonstration, orin the prosecution of concerted observa-tion, simultaneous observation of the same object is not only convenient,but is also greatly economical of time. Moreover, when the objectsobserved are moving, it is next to impossible for two observers succes-sively to identify the same aspects. These considerations give great Fig-. Double Microscope.
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Keywords: ., bookcentury1800, booksubjectmachinery, booksubjectscientificappa
