According to C. H. Hayes (of Wallace and Sons), "This machine was built in the summer of 1873, for a plaything. The armature is of the Gramme type, and is probably the first Gramme armature wound in ...

Chapter IV. treats of those dynamo-electric machines which generate continuous currents, beginning with Pacinotti's machine of 1863, and including the well-known forms of Gramme and Siemens (v.