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‎Recherches sur la Théorie de la Machine de Gramme, sur la Cause de la Position dissymétrique de ses Frotteurs, et incidement, Étude des Écrains magnetiques.‎

‎Paris, G. Masson, Imprimerie Gauthier-Villars, 1879. 8vo. Contemporary half calf, raised bands, gilt spine. Light wear along edges. Small stamps on verso of title-page. In ""Annales de Chimie et de Physique"", Cinquiéme Series - Tome XVI. 576 pp. a. 2 folded plates. (Entire volume offered). Breguet's paper: pp. 5-48 a. 1 large folded engraved plate.‎

‎First edition of this importent paper giving the first physical theory of the Grammo machine's magnetic function. - Wheeler Gift No. 3990.A Gramme machine, Gramme ring, Gramme magneto, or Gramme dynamo is an electrical generator which produces direct current, named for its Belgian inventor, Zénobe Gramme, and was built as either a dynamo or a magneto. It was the first generator to produce power on a commercial scale for industry.‎