But his researches in physical optics constitute his chief title-deed to immortality.
Cuvier (1769-1832) is that he started a new view as to the relationship of animals, which he may be said in a large measure to have demon strated as true by his own anatomical researches.
During the three years he held this position he carried out researches on the contact of elastic solids, hardness, evaporation and the electric discharge in gases, the last earning him the special commendation of Helmholtz.
The researches of Liebig (1823), Liebig and Gay-Lussac (1824), and of Liebig again in 1838 showed the acid to be isomeric with cyanic acid, and probably (Hcno) 2, since it gave mixed and acid salts.
It has been sometimes misspelt "Tapacolo," as by C. Darwin, who gave (Journal of Researches, chap. xii.) a brief but entertaining account of the habits of this bird and its relative, Hylactes megapodius, called by the Chilenos "El Turco."
