Most studies of reading have dealt with one or the other of two factors involved: (a) speed and (b.) comprehension. The psychological act of obtaining meaning from the printed page is very involved, as in any process of symbolic interpretation. It is here contended that either of the two factors cited is in itself inadequate and that they must be combined to give a meaningful index of accomplishment. Such a concept is herein described as the reading efficiency index and is obtained by multiplying the rate in words per minute by the comprehension calculated in per cent. It compares favorably with commercial practices of assaying samples of ore, grain, foodstuffs or other materials to determine the net value of a lot or consignment. In readin...