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The scales of FORTIN might give a millionth part and more; and LEFEVRE-GINEAU employed in all these experiments and calculations the most scrupulous degree of exactness. Thus the METRE or principal unit of the French linear measures has furnished those of the weights; and all this grand system, taken from nature, is connected with the base the most invariable, the size of the earth itself.
Exact experiments, made by LEFEVRE-GINEAU, with instruments constructed by FORTIN, shewed the weight of the cubic decimetre of distilled water, at the point of the greatest condensation to be 18827.15 grains of the pile of 50 marcs, which is preserved here in the Hotel de la Monnaie, and is called Le poids de Charlemagne; the toise being supposed at 13 degrees of the thermometer of 80 degrees.
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