"Experimental Physics Institutions XIXth Silbermann Ducretet Apparatus In Paris"
Silbermann Apparatus Signed Ducretet In Paris This apparatus is intended to verify the laws of reflection and refraction of light Composed of a divided circle with a limb, on a tripod with a column. The circle is equipped with two alidades, the mirrors are in good condition. Copy identical to that of the Lycée Voltaire in Paris 
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