Obs. [f. as prec. + -ISM.] = TITHONICITY, ACTINISM 2. So † Tithonize v., trans. to subject to actinic influence (hence † Tithonization, ‘tithonic’ or actinic action; † Tithonized ppl. a.); † Tithonograph, a photograph produced by the action of ‘tithonic’ rays on a sensitized surface (so Tithonographic a., -o-graphist, -ography); † Tithonometer, † Tithonotype, see quots.
1854. J. Scoffern, in Orr’s Circ. Sc., Chem., 93. That peculiar associate of light which has been termed … actinism, *tithonism, and energia.
1844. (July) Draper, in Philos. Mag., XXV. 7. The indigo ray forms the muriatic acid as well as produces the preliminary *tithonization. Ibid. Before placing the tubes in the prismatic spectrum we *tithonize them in the daylight. Ibid., 2. I shall speak of chlorine which has been exposed to the beams of the sun, as *tithonized chlorine. Ibid. (1842), (Dec.), XXI. 456. The comparison of different spectras and their corresponding *tithonographs. Ibid., 461. If the *tithonographic compound radiates whilst it is undergoing decomposition.
1878. Lockyer, Spectr. Anal., iii. § 2. 82. Draper … in his ‘tithonographic representation,’ had … not succeeded in registering the lines of the yellow, orange, and green parts of the spectrum.
1842. Draper, in Philos. Mag., XXI. 456. A principle … which makes the spectra of different *tithonographists comparable.
1842. *Tithonometer [see TITHONIC].
1843. (Dec.) Draper, in P. M., XXIII. 401. Description of the Tithonometer, an instrument for measuring the Chemical Force of the Indigo-tithonic Rays. Ibid. (1842), (May), XXII. 366. As a name for these processes of copying the surface of a Daguerreotype, I would suggest the word *Tithonotype.
