A practical essay, on a cement, and artificial stone : Justly supposed to be that of the Greeks and Romans, Lately re-discovered by Monsieur Loriot, master of mechanics to His Most Christian Majesty, for the cheap, easy, expeditious and durable construction of all manner of buildings, and formation of all kinds of ornaments of architecutre, even with the commonest and coarfest materials. Translated from the French original, lately published, by the express orders of the above monarch.