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Extrait des Regiftres de l'Académie Royale des Sciences, du premier Mars 1777.

Effieurs Leroy & Vandermonde ayant fait leur rapport à l'Académie du feptieme Tome de fa Collection des Machines; l'Académie a jugé que cet Ouvrage méritoit de paroître fous fon Privilége en foi de quoi j'ai figné le préfent Certificat. A Paris ce 28 Mars 1777.

Le Marquis de CONDORCET.

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RECUEIL

DES MACHINES

APPROUVÉES

PAR L'ACADÉMIE ROYALE

DES SCIENCES.

ANNÉE 1734.

Rec, des Machines,

TOME VII. A

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