I am profoundly interested in all phases of my business, and of course I learn from the experience of others as well as from my own. But it is very difficult to learn how to manipulate stocks to-day from such yarns as are told of an afternoon in the brokers’ offices after the close. Most of the tricks, devices and expedients of bygone days are obsolete and futile; or illegal and impracticable. Stock Exchange rules and conditions have changed, and the story--even the accurately detailed story--of what Daniel Drew or Jacob Little or Jay Gould could do fifty or seventy-five years ago is scarcely worth listening to. The manipulator to-day has no more need to consider what they did and how they did it than a cadet at West Point need study archery as practiced by the ancients in order to increase his working knowledge of ballistics. On the other hand there is profit in studying the human factors--the ease with which human beings believe what it pleases them to believe; and how they allow themselves--indeed, urge themselves--to be influenced by their cupidity or by the dollar-cost of the average man’s carelessness. Fear and hope remain the same; therefore the study of the psychology of speculators is as valuable as it ever was. Weapons change, but strategy remains strategy, on the New York Stock Exchange as on the battlefield. I think the clearest summing up of the whole thing was expressed by Thomas F. Woodlock when he declared: “The principles of successful stock speculation are based on the supposition that people will continue in the future to make the mistakes that they have made in the past.” In booms, which is when the public is in the market in the greatest numbers, there is never any need of subtlety, so there is no sense of wasting time discussing either manipulation or speculation during such times; it would be like trying to find the difference in raindrops that are falling synchronously on the same roof across the street. The sucker has always tried to get something for nothing, and the appeal in all booms is always frankly to the gambling instinct aroused by cupidity and spurred by a pervasive prosperity. People who look for easy money invariably pay for the privilege of proving conclusively that it cannot be found on this sordid earth. At first, when I listened to the accounts of old-time deals and devices I used to think that people were more gullible in the 1860’s and ’70’s than in the 1900’s. But I was sure to read in the newspapers that very day or the next something about the latest Ponzi or the bust-up of some bucketing broker and about the millions of sucker money gone to join the silent majority of vanished savings.