Mechanical Measurement Equipment

A metal instrument for obtaining a diagram of the pressure-volume or pressure-time changes in a steam engine or compression cylinder during the working cycle. The instrument is mounted in a wooden case with several loose pieces of the instrument in the bottom of the case. The case is rectangular with brass hinges and internal fittings, a metal handle and hook fastenings. The company that produced the instrument was "____eering and Power Company Jamestown N.Y. 4687"