Sub-series contains Water Power Sheets used by the Essex Company to record daily amount of water power used by various customers. The materials are from 1870 to 1982, but the bulk of the recordings are from 1880-1945. These sheets are monthly or bimonthly tabulations, and include recordings for time of observation, height of water in canal and river, fall from canal to river, quantity of water per mill power, and specific data related to each water wheel / turbine used in a mill.
Collection
Essex Company Collection
Materials are approximately 18x24 paper.