Whenever a rise or fall appears to take place in the price of any one article or commodity, that is to say whenever a difference takes place in the relation which that article bears to money--all other commodities remaining unchanged--such difference must naturally and properly be attributed to changed conditions affecting the commodity, and not to a change in the value of money. But wherever there is a fall in prices throughout the whole range of commodities then it is clear that this change is mainly due to a change in the value of money. Such however is the force of education and habit that the masses of the people are slow to suspect any change in the standard by which they have been accustomed to gauge or measure all values. Indeed they find it difficult to understand how under any circumstances any change can take place in it. Having their eyes fixed on the standard, and on that alone, they naturally attribute to the articles measured, and not to the standard, any difference that may seem to arise in the relation they bear to each other. But the apparent is not always the real. Nothing seems more warranted by the evidence of our senses than that the earth is a stationary object, while the sun revolves around it. For thousands of years the world was convinced of the truth of the geocentric theory of the universe, and millions of men have lived and died in the confident belief that this planet was immovably fixed in space, while the sun was a rolling and ever-shifting body. Even yet, among the mass of mankind, so ever-present is this impression, derived from ocular demonstration, that in spite of the declarations of science, the world continues in common use the phrases which originally described the process that took place, as men understood it; hence we speak of the "rising" and the "setting" of the sun. In the same way we speak of the rise or fall in the value of commodities, without being particular to note whether the change that has taken place is strictly a change in the value of the article itself or a change in the money with which its value is measured. Perhaps I can best illustrate my meaning by an allegory: THE BATTLE OF THE STANDARDS. THE ALLEGORY OF THE CLOCKS.