Coloured diagram of Intermittent Pressure Recorder
Coloured diagram of Intermittent Pressure Recorder taken from the "White lead engine at the Lead Works" 8.2.1860. In frame 17 1/2" x 4 1/2"
Coloured diagram of Intermittent Pressure Recorder taken from the "White lead engine at the Lead Works" 8.2.1860. In frame 17 1/2" x 4 1/2"
