| 1. |  | Pouring brass into molds for battery terminal construction at Proof Machine & Brass Foundry | Proof Machine & Brass Foundry; Employees; Foundries; Electric batteries; Machine industry; Clark Cable Corporation; Brass castings; Moldings | Employees of Proof Machine & Brass Foundry prepare to pour melted brass for use in battery terminal construction. Proof Machine & Brass Foundry was a non-ferrous foundry making brass battery terminals... |