We report the viscosities of solutions of glycerin, sucrose, glucose, or fructose in water or in 0.5 M sodium carbonate + 0.5 M sodium bicarbonate buffer at concentrations from 0 to 150 g.L(-l) and temperatures from 288.1 to 323.1 K. An equation gave the dependence of kinematic viscosity on concentration and temperature with a deviation of less than 1.2%.