Ca. 1880s-1900s. Hand-made scientific apparatus, presumably made for the study or demonstration of an electrical application involving magnetism as the model incorporates a moving coil and magnetic field. Seemingly fabricated from material found in the lab’s workshop, it is composed of metal—copper and at least one other metal—wood, paper, two different gauges of cloth-covered wire, assorted and mismatched screws, nuts, washers, etc. The whole is mounted to a wooden base measuring 6 1/2 x 3 3/8 x 5/8 in. (165 x 85 x 15 mm). There is a wooden clamp attached to the armature with a contemporary label inscribed: “Herbert S. Read/Edison Lab’y”.