Another feature of these industrial phenomena is the acceleration of their periodicity. During the decades which marked the end of the nineteenth century and the beginning of the twentieth, the number of years which elapsed between one crisis and the next was becoming smaller and the periods were appreciably shorter than those of the earlier cycles. Fourteen, twelve, or ten years used to be the intervals between crises, but in the last forty years this interval has gradually shortened, until only three years intervened between the end of one crisis and the beginning of the next. This is in strict accordance with what we would expect to find. The means of supplying the effective demand of the people for goods has increased out of all proportion to the increase in that effective demand, with the natural result that the market gets choked full to overflowing in an ever-shortening time. When to this is added the continuous perfecting of processes and equally continuous speeding up of production, we see that under the conditions which obtain it necessarily follows that the periods which must elapse before the markets are choked up with goods must get progressively shorter, while the periods necessary to relieve the glut again grow gradually longer. Thus, we had a crisis in the late “’seventies,” another in 1888–89; another in 1893, of a milder type; another in 1898; another, very acute, in 1904–05; and another, the worst the industrial world in Britain has known, in 1908–09–10; while evidences were not wanting when war broke out that we were again on the downward sweep of the cycle. THE EFFECT ON CO-OPERATION.