The Great Events by Famous Historians [Volumes 1-14]

Such opinions, which I need not here criticise, had obtained a footing from mere routine as decided. Men of genius, the "manufacturers of ideas," it seemed, were to remain strangers to material enjoyments; it was natural that their history should continue to resemble a legend of martyrs!

Whatever may be thought of these reflections, it is certain that the Cornwall miners paid the dues that were granted to the Soho engineers with increased repugnance from year to year. They availed themselves of the very earliest difficulties raised by plagiarists, to claim release from all obligation. The discussion was serious; it might compromise the social position of our associate: he therefore bestowed his entire attention to it and became a lawyer. The long and expensive lawsuits that resulted therefrom, but which they finally gained, would not deserve to be now exhumed; but having recently quoted Burke as one of the adversaries to our great mechanic, it appears only a just compensation here to mention that the Roys, Mylnes, Herschels, Delucs, Ramsdens, Robisons, Murdocks, Rennies, Cummings, Mores, Southerns, eagerly presented themselves before the magistrates to maintain the rights of persecuted genius. It may be also advisable to add, as a curious trait in the history of the human mind, that the lawyers—I shall here prudently remark that we treat only of the lawyers of a neighboring country—to whom malignity imputes a superabundant luxury in words, reproached Watt, against whom they had leagued in great numbers, for having invented nothing but ideas. This, I may remark in passing, brought upon them before the tribunal the following apostrophe from Mr. Rous: "Go, gentlemen, go and rub yourselves against those untangible combinations, as you are pleased to call Watt's engines; against those pretended abstract ideas; they will crush you like gnats, they will hurl you up in the air out of sight!"

The persecutions which a warm-hearted man meets with, in the quarters where strict justice would lead him to expect unanimous testimonies of gratitude, seldom fail to discourage, and to sour his disposition. Nor did Watt's good-humor remain proof against such trials. Seven long years of lawsuits had excited in him such a sentiment of indignation, that it occasionally showed itself in severe expressions; thus he wrote to one of his friends: "What I most detest in this world are plagiarists! The plagiarists. They have already cruelly assailed me; and if I had not an excellent memory, their impudent assertions would have ended by persuading me that I have made no improvement in steam-engines. The bad passions of those men to whom I have been most useful (would you believe it?) have gone so far as to lead them to maintain that those improvements, instead of deserving this denomination, have been highly prejudicial to public wealth."

Watt, though greatly irritated, was not discouraged. His engines were not, in the first place, like Newcomen's, mere pumps, mere draining-pumps. In a few years he transformed them into universal motive powers, and of indefinite force. His first step in this line was the invention of a double-acting engine (à double effet).

In the engine known under this name, as well as in the one denominated the "modified" engine, the steam from the boiler, when the mechanic wishes it, goes freely above the piston and presses it down without meeting any obstacle; because at that same moment, the lower area of the cylinder is in communication with the condenser. This movement once achieved, and a certain cock having been opened, the steam from the caldron can enter only below the piston and elevates it. The steam above it, which had produced the descending movement, then goes to regain its fluid state in the condenser, with which it has become, in its turn, in free communication. The contrary arrangement of the cocks replaces all things in their primitive state, as soon as the piston has regained its maximum height. Thus similar effects are reproduced indefinitely.

Power is not the only element of success in industrial works. Regularity of action is not less important; but what regularity could be expected from a motive power engendered by fire fed by shovelfuls, and the coal itself of various qualities; and this under the direction of a workman, sometimes not very intelligent, almost always inattentive? The motive steam will be more abundant, it will flow more rapidly into the cylinder, it will make the piston work faster in proportion as the fire is more intense. Great inequalities of movement then appear to be inevitable. Watt's genius had to provide against this serious defect. The throttle-valves by which the steam issues from the boiler to enter the cylinder are constantly open. When the working of the engine accelerates, these valves partly close; a certain volume of steam must therefore occupy a longer time in passing through them, and the acceleration ceases. The aperture of the valves, on the contrary, dilates when the motion slackens. The pieces requisite for the performance of these various changes connect the valves with the axes which the engine sets to work, by the introduction of an apparatus, the principle of which Watt discovered in the regulator of the sails of some flour-mills: this he named the "governor," which is now called the "centrifugal regulator." Its efficacy is such, that a few years ago, in the cotton-spinning manufactory of a renowned mechanic, Mr. Lee, there was a clock set in motion by the engine of the establishment, and it showed no great inferiority to a common spring clock.