Paris: Chez Guillot, 1785. First French Edition. Hardcover. xxiv, 343, (5). 20.5 x13 cm. Cavallo's 1777 Complete Treatise on Electricity, his most important work. "An excellent compendium, the Treatise served the needs of both the neophyte and the initiate, who found in its appendixes valuable details about medical electricity; about..... More