[f. as prec. + -GRAPHY: cf. F. thermographie.] Any process of writing or drawing effected or developed by the influence of heat.
1840. Hunt, in Philos. Mag., Oct., 268. A new … field of inquiry, which may … end in … the establishment of the new art of Thermography. Ibid. (1842) Dec., 466. I … proposed the name of Thermography, to distinguish it from Photography.
1848. Art-Union Jrnl., March, 71. From the circumstance that all the results … exhibit a very close relation between the surfaces employed and their powers of radiating heat, the term Thermography or Heat-drawing has been employed.
1875. Ure’s Dict. Arts, etc. (ed. 7), Thermography, a term proposed … to express the ‘Art of Copying Engravings, &c. on Metal Plates’; the effect being due … to the influence of heat-radiations.
1883. J. F. Campbell, Thermography, i. § 3. 11. Ibid., 12. Because light does not act upon the materials used, dark cameras are not needed in thermography.
