Paper, 'On a deep sea electrical thermometer' by C W [Charles William] Siemens Siemens writes on an instrument he described in his Bakerian Lecture for 1871 (see Proceedings of the Royal Society, volume 19), which is now 'largely used as a pyrometer for determining the temperatures of hot blasts and smelting furnaces.' He shares details of experiments made using the instrument. Annotations in pencil and ink throughout. Includes a circuit diagram relating to the thermometer. Subject: Marine engineering Received 7 June 1882. Read 15 June 1882. A version of this paper was published in volume 34 of the Proceedings of the Royal Society as 'On a deep sea electrical thermometer'. 1882