London, L. Davis and C. Reymers, 1763. 4to. Without wrappers. Extracted from ""Philosophical Transactions"", vol. 52, part II. Including title-page of volume (detached). A fine copy. Pp. 457-464 + title-page.
First appearance of this paper in which the relationships between the temperatures of various materials"") and their conductivity or non-conductivity is being discussed.