Summary%-Methyloctane and three new nonanes, 2, 3-dimethylheptane, 3-ethyloctane and 2, 2, 4, 4-tetramethylpentane have been prepared. Boiling point, index of refraction, density, freezing curves and viscosity have been determined for the four nonanes. STATE COLLEGE, PENNA. RECEIVED AUGUST 15, 1938