"It is said that ideas produce revolutions and truly they do—not spiritual ideas only, but even mechanical."—Carlyle.


I.—THE MARQUIS OF WORCESTER.

As the last century was drawing to its close, two great revolutions were in progress, both of which were destined to exercise a mighty influence upon the years to come,—the one calm, silent, peaceful, the other full of sound and fury, bathed in blood, and crowned with thorns,—the one the fruit of long years of patient thought and work, the other the outcome of long years of oppression, suffering, and sin,—the one was Watt's invention of the steam engine, the other the great popular revolt in France. These are the two great events which set their mark upon our century, gave form and colour to its character, and direction to its aims and aspirations. In the pages of conventional history, of course, the French revolution, with its wild phantasmagoria of retribution, its massacres and martyrdoms, will no doubt have assigned to it the foremost rank as the great feature of the era,—

"For ever since historians writ,
And ever since a bard could sing,
Doth each exalt with all his wit
The noble art of murdering."

But those who can look below the mere surface of events, and whose fancy is not captivated by the melo-drama of rebellion, and the pageantry of war, will find that Watt's steam machine worked the greatest revolution of modern times, and exercised the deepest, as well as widest and most permanent influence over the whole civilized world.

Like all great discoveries, that of the motive power of steam, and the important uses to which it might be applied, was the work, not of any one mind, but of several minds, each borrowing something from its predecessor, until at last the first vague and uncertain Idea was developed into a practical Reality. Known dimly to the ancients, and probably employed by the priests in their juggleries and pretended miracles, it was not till within the last three centuries that any systematic attempt was made to turn it to useful account.

But before we turn our attention to the persons who made, and, after many failures and discouragements, successfully made this attempt, it will be advisable we should say something as to the principle on which their invention is founded.