[BRIDGES and ROADS]. GAUTIER, HENRI. Trait des Ponts [...des Chemins]. Paris, 1765 [-1755]. 2 engraved frontispieces and 34 folding plates. 2 vols -- [LECREULX, FRANCOIS-MICHEL]. Mmoire sur la Construction des Chemins Publics. [Paris], 1782 -- GENNET, CLAUDE LEOPOLD. Pont de Bois de Charpente, Horizontal.... Nancy, 1770. 7 engraved folding plates. Contemporary quarter calf gilt -- EXCHAQUET, H. Dictionnaire des Ponts et Chausses. Lausanne and Paris, 1787. Contemporary quarter calf gilt -- COURTIN. Travaux des Ponts-et-Chausses depuis 1800.... Paris, 1812. Together 6 vols., all 8vo, contemporary calf gilt, minor wear to extremities ; minor browning except as noted. (6)