Abstract
The excellent article of H. Staudinger and K. Wagner on “The constitution of urea-and thiourea-formaldehyde condensates” (Makromol, Chem., 12,168-235 (1954)) is studied in the present article. In chapter 1 the character of the article is described from its “introduction” and “summary”, then in chapter 3 the fundamental experiments of “Staudinger school” are introduced : i. e. the molecular weight estimation by caprolactam, methoxyl radical and chloral and the perfect elementary analysis. Meanwhile in chapter 2 the article of F. Pollak on “Methylol-thioureas (1939)” and the supplement to the article of H. Fahrenhorst (1955) are abstracted as the problems relating to the, Staudinger's article. At last in chapter 4 the melting point problems are pointed out.
