抄録
A simple and handy method determining the concentration of pulp solution is described; with a definite quantity of the solution in a beaker, stirred by a propeller, time is measured from the instant at which this propeller is drawn out from this liquid, till this liquid comes to standstill. This time is taken as the measure of the concentration. Some factors gover-ning this time, say, dimension of the beaker, quantity of solution used, initial speed of rota-tion etc. are also considered.
