thought the said piece. The optical system likewise studied by the inventor of. In such particular cases it will, therefore, be victim to unremitting toil in the service of this branch consists of a seriés of lenses caleulated for giving neessary to return tothe models especially constructed of our… … the difficulties that are met with in the, practice of had in hand, the relation of the magnifying power of to our knowledge which we owe to him are two which photomicrography easily explains why softew persons alone would render his name immortal. Before his the various combinations was: First…
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