HAÜY (René-Just). EXPOSITION RAISONNEE DE LA THEORIE DE L'ELECTRICITE et du magnétisme, d'après les principes de M. Æpinus. Paris, Veuve Desaint, 1787. In-8, [32]-238 pages, half blond basane, smooth spine decorated (later binding). First edition illustrated with 4 folding plates. Marginal damage to the first few leaves, one plate repaired, another with a small hole.