was 31,443,321. In 1920the population was shown to be 105,-710,620—an increase, roughly taken,about three times in population. The total number of patents in thatfirst 70 years was about 6,500 and inthe succeeding 65 years the total num-ber reached 1,664.477—250 times asmany as in the first period… … » *V ^55 Jiy. 4
