Rulers, undated

Series “V. Tools and realia” dates from 1840 to circa 1920s and contains objects and research materials used in the Birkinbine Engineering Company offices. This series includes Birkinbine patents, notably the combined fire hydrant, and other patent models from the State Machine Company in Hartford, Connecticut. It contains envelopes of soil samples from Little Elk Creek and a rolled silk fabric sample. This series also contains office supplies from the Birkinbine Engineering Company, including scales, rulers and measuring implements, an engraving press, and writing implements. This series includes negative exposure cases, a glass plate holder with a sheet of glass, Carl Birkinbine’s monocle, metal-plated wooden print blocks, a metal plate engraved with “plan and section of water works and pump,” and assorted wooden and metal tools.