But while thus continually occupied with new enterprises and objects, he did not lose sight of his great idea, the Caloric-Engine. All his spare hours and spare funds were devoted to experiments with the view of overcoming the practical difficulties which stood in the way of its success. Towards the end of the year 1851 he seemed to be on the point of realizing his hopes, having constructed a large stationary engine, which was applied with great success, at the Phoenix Foundry in New York, to the actual work of pumping water. Soon after, through the liberality of Mr. John B. Kitching, a well-known merchant of New York, he was enabled to test the invention on a magnificent scale. A ship of two thousand tons, propelled by the power of caloric-engines, was planned and constructed by him in the short space of seven months, and in honor of the inventor received the name of the "Ericsson."
Every one will remember the interest which this caloric-ship excited throughout the country. She made a trip from New York to Alexandria on the Potomac, in very rough weather, in the latter part of February, 1853. On this trip the engines were in operation for seventy-three hours without being stopped for a moment, and without requiring the slightest adjustment, the consumption of fuel being only five tons in twenty-four hours. At Alexandria she was visited by the President and President elect, the heads of the departments, a large number of naval officers, and many members of both Houses of Congress, and subsequently by the foreign ministers in a body, and by the Legislature of Virginia, then in session. Ericsson was invited by a committee of the Legislature to visit Richmond, as the guest of the State. The Secretary of the Navy recommended, in a special communication to Congress, the passage of a resolution authorizing him to contract for the construction of a frigate of two thousand tons to be equipped with caloric-engines, and to appropriate for this purpose five hundred thousand dollars. This recommendation failed in consequence of the pressure of business at the close of the session.
But notwithstanding the surprise and admiration which this achievement excited in the scientific world, the speed attained was not sufficient to meet the practical exigencies of commerce; and the repetition of the engines on this large scale could not be undertaken at the charge of individuals. Ericsson accordingly wisely devoted himself to perfecting the Calorie-Engine on a small scale, and in 1859 he produced it in a form which has since proved a complete success. It is no longer a subject of experiment, but exists as a perfect, practical machine. More than five hundred of these engines, with cylinders varying from a diameter of six inches to one of forty inches, are now in successful operation. It is applied to purposes of pumping, printing, hoisting, grinding, sawing, turning light machinery, working telegraphic instruments and sewing-machines, and propelling boats. No less than forty daily papers (among which we may mention the "National Intelligencer") are printed by means of this engine. In Cuba it is used for grinding sugar-cane, on Southern plantations for ginning cotton; and there is an endless variety of domestic, agricultural, and mechanical uses to which it may be advantageously applied.
The extent of power attainable by this machine, consistently with its application to practical uses, is not yet precisely defined. Within the limit thus far given to it, its power is certain, uniform, and entirely sufficient. It is not attended with the numerous perils that make the steam-engine so uncomfortable a servant, but is absolutely free from danger. It requires no engineering supervision. It consumes a very small amount of fuel (about one-third of the amount required by the steam-engine) and requires no water. These peculiarities not only make it a very desirable substitute for the steam-engine, but render it available for many purposes to which the steam-engine would never be applied.
In addition to his regular professional avocations, Ericsson was industriously occupied in devising new applications of the Calorie-Engine, when the attempted secession of the Southern States plunged the country into the existing war and struck a blow at all the arts of peace. Ills whole heart and mind were given at once to the support of the Union. Liberal in all his ideas, he is warmly attached to republican institutions, and has a hearty abhorrence of intolerance and oppression in all their forms. His early military education and his long study of the appliances of naval warfare increased the interest with which he watched the progress of events. The abandonment of the Norfolk navy-yard to the Rebels struck him as a disgrace that might have been avoided. He foresaw the danger of a formidable antagonist from that quarter in the steamship which we had so obligingly furnished them. The building of gun-boats with steam-machinery above the water-line—where the first shot from an enemy might render it useless—seemed to him, in view of what he had done and was ready to do again, a very unnecessary error. Knowing thoroughly all the improvements made and making in the war-steamers of England and France, and feeling the liability of their interference in our affairs, he could not appreciate the wisdom of building new vessels according to old ideas. The blockade of the Potomac by Rebel batteries, in the very face of our navy, seemed to him an indignity which need not be endured, if the inventive genius of the North could have fair play.
An impregnable iron gun-boat was, in his judgment, the thing that was needed; and he determined that the plan of such a vessel should be his contribution towards the success of the war. The subject was not a new one to him. He had given it much consideration, and his plan, in all its essential features, had been matured long before. Proposals for iron-clad vessels having been invited by the Navy Department, Ericsson promptly submitted his plans and specifications. Knowing the opposition that novelties always encounter, he had no great expectation that his proposal would be accepted. "I have done my part," said he; "I have offered my plan. It is for the Government to say whether I shall be allowed to carry it out." He felt confident, however, that, if the plan should be brought to the notice of the President, his practical wisdom and sound common sense could not fail to decide in its favor. Fortunately for the country, Ericsson's offer was accepted by the Navy Department. He immediately devoted all his energies to the execution of his task, and the result was the construction of the vessel to which he himself gave the name of the "Monitor." What she is and what she has accomplished, we need not here repeat. Whatever may be her future history, we may safely say, in the words of the New York Chamber of Commerce, that "the floating-battery Monitor deserves to be, and will be, forever remembered with gratitude and admiration."
We rejoice to believe that the merits and services of Ericsson are now fully appreciated by the people of the United States. The thanks of the nation have been tendered to him by a resolution of Congress. The Boston Board of Trade and the New York Chamber of Commerce have passed resolutions expressive of their gratitude. The latter body expressed also their desire that the Government of the United States should make to Captain Ericsson "such suitable return for his services as will evince the gratitude of a great nation." Upon hearing this suggestion, Ericsson, with characteristic modesty, remarked,—"All the remuneration I desire for the Monitor I get out of the construction of it. It is all-sufficient." Nevertheless we think the suggestion well worthy of consideration. In the same spirit of manly independence, he discountenanced the movement set on foot among the merchants of New York for the subscription of a sum of money to be presented to him. He asks nothing but fair remuneration for services rendered,—and that, it is to be hoped, the people will take care that he shall receive.
Ericsson is now zealously at work in constructing six new iron gun-boats on the plan of the Monitor. If that remarkable structure can be surpassed, he is the man to accomplish it. His ambition is to render the United States impregnable against the navies of the world. "Give me only the requisite means," he writes, "and in a very short time we can say to those powers now bent on destroying republican institutions, 'Leave the Gulf with your frail craft, or perish!' I have all my life asserted that mechanical science will put an end to the power of England over the seas. The ocean is Nature's highway between the nations. It should be free; and surely Nature's laws, when properly applied, will make it so."
His reputation as an engineer is worldwide. In 1852 he was made a Knight of the Order of Vasa by King Oscar of Sweden. The following extract from a poem "To John Ericsson" we translate from "Svenska Tidningen," the Government journal of Stockholm. It is eloquently expressive of the pride and admiration with which he is regarded in his native country.
"World-wide his fame, so gracefully adorning
His native Sweden with enduring radiance!
Not a king's crown could give renown so noble:
For his is Thought's great triumph, and the sceptre
He wields is over elements his subjects!"