=388. Sensitiveness.=—The modern commercial organization has been likened to clock work, because of its regularity. Carrying further this comparison, it may be said that it is like a delicate chronometer, in which every movement is attended with the minimum of friction. The power of modern commerce appears in the vast quantities of wares which are exchanged through its agency; its sensitiveness is shown by the readiness with which the currents of trade are turned or even reversed to suit the occasion. It has been said that commerce turns from one side of the globe to the other on a difference of a cent on a bushel of grain, a dollar on a ton of metal, a quarter of a cent a yard on a textile fabric, or a sixteenth of a cent on a pound of sugar. So sensitive has the commercial world become to every stimulus that it feels also every shock. When the McKinley tariff bill was passed in the United States, it is said that the next day several thousand workmen, employed in the manufacture of pearl buttons in a city of far-off Austria, were thrown out of work. Brief interruptions of commerce, by the outbreak of epidemic diseases, by storms or other natural phenomena, or by strikes of workers engaged in transportation, rouse serious anxiety. The sensitiveness of modern commerce may be shown, further, by the refinements to which the principle of the division of labor has been carried. It is said that in the leather manufacture skins are sometimes sent across the ocean four times, to effect economies in subordinate treatments. =389. Importance of the telegraph, illustrated by conditions preceding its introduction.=—While the various changes in commerce indicated above can be ascribed largely to the use of steam in transportation, they would be inconceivable, in their present form, if the electric telegraph had not been extended over all lands and under all seas.