Paper, 'On the thermal effects of fluids in motion' by William Thomson and J P [James Prescott] Joule

Description

Thomson and Joule outline an experiment into the depression of temperature observed when steam of high pressure issues from a small orifice into the open air. A short pipe an inch and a half diameter is screwed into an elbow pipe inserted into the top of a high pressure steam boiler. A cotton plug placed in the short pipe has a fine wire of platinum alloy passed through it, the ends of which are connected with iron wires passing away to a sensitive galvanometer. Thomson and Joule find that for each pound of pressure by which the steam on the pressure side exceeds that of the atmosphere on the exit side there is a cooling effect of 0.2 degrees Celsius.

Subject: Physics

Received 11 February 1856.

This paper was published in full in volume 8 of the Proceedings of the Royal Society as 'On the thermal effects of fluids in motion'.

Reference number

AP/38/9

Earliest possible date

1856

Physical description

Ink on paper

Page extent

3 pages

Format

Manuscript