CLXXIX.—The viscosity of cellulose in cuprammonium hydroxide solution. Part I. The determination of the viscosity

all technical work connected with cellulose an accurate determination of its viscosity in cuprammonium hydroxide (Schweitzer's reagent) is of importance, for it is largely the viscosity of the cellulose which determines the viscosity figure of solutions of the nitrocellulose or acetylcellulose made therefrom. If, for example, a nitrocellulose is required which w i l l dissolve in acetone to give a high viscosity, a cellulose must be taken which will give a high viscosity in Schweitzer's reagent.