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PHOTOMETRISCHE UNTERSUCHUNGEN.

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»Nec manus nuda, nec intellectus sibi permissus, multum valet: instrumentis et auxiliis res perficitur, quibus opus est non minus ad intellectum quam ad manum.

» Insanum quiddam esset et in se contrarium, existimare ea quae adhuc nunquam facta sunt, fieri posse, nisi per modos adhuc nunquam tentatos.«

BACO VERULAMIUS.
Novum Organum, Lib. I. Aphor. II et VI.

DEM ANDENKEN

BOUGUER'S UND LAMBERT'S

GEWIDMET.

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