The Constitution of Nitrated Cellulose

IN a recent publication (Zeit. fur physikal. Chem., 130, 616; 1927), Herzog and von Naray-Szabo gave an account of the X-ray examination of ramie fibre nitrated in various ways, and concluded that for any nitrocellulose containing from 4.41 to 13.31 per cent of nitrogen the diffraction spots on the ‘fibre diagrams’ were produced mainly by the substance cellulose trinitrate, two spots from unchanged cellulose occasionally persisting, and that all nitrocelluloses were therefore principally mixtures of cellulose trinitrate and cellulose.