Description and use of a thermometer for measuring the higher degrees of heat

Description and use of a thermometer for measuring the higher degrees of heat, from a red heat up to the strongest that vessels made of clay can support / Josiah Wedgwood. [Published by Joseph Cooper, London, 1784, 26p. 'Extracted from a Paper communicated by him [Wedgwood] to the Royal Society May 9th, 1782, and published in Vol.LXXII of the Philosophical Transactions. On ScM neg. 705/67. Associated with inv. no. 1927-1812, a Wedgwood pyrometer etc. in the George III collection]