Kitabı oku: «Beacon Lights of History, Volume 14: The New Era», sayfa 11
Taking Ericsson's life and work, what portion remains as a permanent acquisition or as a part of the practice of the present age? This is a question which merits at least a moment's notice.
We should not make the mistake of thinking that permanency is necessarily a test of merit, or that the value of his services to the world should be judged by such parts of his work as are plainly apparent in the practice of the present day. A piece of work must be judged by the circumstances which brought it forth, and by the completeness and perfection of its adaptation to the needs and possibilities of its age.
We have then the steam fire-engine; compressed air which he early employed in England, and which has become an instrument of enormous importance in connection with the industrial progress of the age, although this is in no especial degree due to his efforts; the surface condenser, distiller, and evaporator are a permanently and absolutely essential part of modern marine practice; the screw-propeller has almost sole possession of the field of marine propulsion; modern marine engines and boilers in naval practice are always placed below the water-line and are protected by deflective deck armor and frequently by coal as well; the turret has become a permanent and accepted part of the practice of the age, while the monitor type in its essential feature seems to be evanescent.
The modern battleship is a vastly more complex structure, and represents more complex ideas and combinations than did Ericsson's "Monitor." It contains a battery of guns of the heaviest type known to naval ordnance. At present such guns are usually of 12-inch bore and throw a shell of about 800 pounds weight, with an initial velocity of nearly 3,000 feet per second. Then there is a supporting battery of guns, 6, 7, or 8 inches in diameter of bore, and finally a secondary battery of smaller quick-firing guns, throwing shells of from 1 pound to 20 or 30 pounds weight, and added to these there may be a torpedo outfit as well. The exigencies of fighting ships at sea and in all weathers seems to have pronounced against the monitor type with its low freeboard as unsuitable for use on the open sea, while the enormous advances in modern guns and armor have made a totally different problem of the distribution of means offensive and defensive. Again, the monitor type was never intended for long cruising, or indeed for other service than the defence of coasts and harbors. The policy of building a vessel thus adapted only to an inner line of defence, and not adapted to an outer line of defence and offence as well, has been further called in question, and the judgment of the present day has decided against such policy. It is true that in the so-called "new navy," begun in 1883, one monitor, the "Monterey," has been built, while four others of older type have been somewhat modernized, and there are three monitors building at the present time. It may be doubted, however, if they will be followed by others, at least so long as the conditions of naval warfare and the spirit of public policy remain as they now are.
The monitor type was a perfect solution of the problem of its day, and nobly it answered the calls made on it. The problem has now changed, the conditions affecting its solution have also changed, and it is no discredit to the original type that it now seems to have had its day, and that it must give way to other forms more perfectly expressing the spirit of the present age, and the means available for the solution of present-day problems in the art of naval war.
In many ways, however, the influence of Ericsson's work still lives in the modern battleship, and while in our modern designs we have gotten far away from the essential features of the monitor type, yet it is not too much to say that the germ of the modern battleship is in many ways found in the "Monitor," especially as expressed in terms of concentration of heavy gun-fire and localized protection of gun positions; and in more ways than may be suspected, the influence of Ericsson and of his work had its part in the developments which have led to the splendid designs of the present day.
Returning again to our note of the dependence of the present age on Ericsson, mention may be made of the blower for forcing the combustion in steam-boilers as a well-established feature of standard marine practice, and one absolutely essential to the development of the highest attainable speeds, such as are required in warships, and especially in those of the torpedo and modern "Destroyer" types. Likewise the use of the fan for ventilation, as used by him in his early practice, has become a necessity of modern conditions both on naval and passenger ships, for the health and comfort of both passengers and crew. His long series of experiments and his years of labor on air and other forms of "caloric" engine are only represented by the "Ericsson air-engine" now on the market, and having its fair share of service in locations where simplicity of operation and scarcity of water may naturally suggest its use.
Of his labors in connection with a solar engine, and with other questions which occupied much of the time of his closing years, we have but little direct result. Others are at work on the idea of the solar engine, and it may be that a practicable solution of the problem will be found.
Ericsson's lasting imprint on engineering practice, curious as it may seem, was made in his earlier and middle life, rather than in his later years, and we have even more in the way of permanent acquisition from his earlier than from his middle years. This results from the fact that in middle life he was largely engaged on warship designs, admirably adapted to the needs of the time and to the possibilities of the age, but no longer suited to either, while in later life he no longer found it necessary to work at problems which would produce a direct financial return, and therefore interested himself in a variety of questions somewhat farther removed from the walks of every-day engineering practice than those with which he was occupied in earlier life.
In personality Ericsson possessed the most pronounced and self-centred characteristics. Professionally he felt that to him had been granted a larger measure of insight than to others into the mysteries of nature as expressed in the laws of mechanics, and he was therefore little disposed to listen to the advice or criticism of those about him. This was undoubtedly one of Ericsson's most pronounced professional faults. He did not realize that with all his insight into the laws of mechanics and all his capacity for applying these laws to the solution of the problems under consideration, he might well make some use of the work of his fellow-laborers in the same field. So little disposed was he to thus use the work of others that a given device or idea which had been in previous use was often rejected and search made for another, different and original, even though it might involve only some relatively trivial part of the work. He was simply unwilling to follow in the lead of others. He must lead or have none of it, and thus the fact that a device or expedient was in common use would furnish an argument against rather than for its adoption. His natural mode of work was utterly to disregard precedent and to seek for fundamental solutions of his problems, having only in view the conditions to be fulfilled, the laws of mechanics, and the engineering materials of construction. This habit of independence and of seclusion within the narrow circle of his own work so grew upon him in later years that mechanical science made many advances of which he took little or no note, and of which he refused to avail himself, even though he might have done so greatly to his own advantage.
In his later years, in a letter to his friend Captain Adlersparre, he says: "Do not laugh at me now, Captain, when I say that nobody can mislead me. Do not condemn me if I at the same time confess that I am directed by nobody's judgment but my own, and that I never consult anybody and take nobody's advice." In all matters connected with his work his will was imperious, and he would brook no interference or criticism. His temper was high, his organization sensitive, and many times throughout his life, relations with his best friends became strained by his instability of temper or impatience with what he might construe as a criticism regarding his work. With this instability of temper, however, was combined a deep-seated tenderness and kindness of heart, and he was as quick to forget the cause of offence as he was to manifest displeasure upon occasion.
Notwithstanding the asperities of Ericsson's character in regard to his professional work, and his entire lack of effort to make friends among the learned of his day, recognition and unsought honors came in upon him. He was elected to honorary membership in the societies of note in the United States and Sweden, and in addition to the thanks of Congress and of the Legislature of the State of New York, he received a resolution of thanks from the Swedish Riksdag, or Parliament, in 1865. In 1862 he was granted the rarely bestowed Rumford medal, and received at other times during his life medals, honors, and decorations such as have perhaps fallen to no other who has wrought in the same field of human effort. While recognition of this character pleased him greatly when it came spontaneously and willingly, he placed but little value on that which he thought grudgingly or tardily tendered, and in one or two instances refused membership in societies which he thought granted in that manner.
A large measure of this independence of character is necessary to the performance of the work which Ericsson did. Had he been ever ready to listen to the views of others, and to modify his ideas in accordance with them, his greatest achievements would never have been accomplished. In Ericsson, however, this characteristic was carried to an undue extreme, and he might unquestionably have accomplished more had he been able to co-operate with others and to accept and use freely the best work of contemporaries in his own field.
Ericsson was essentially a designing rather than a constructing engineer. His genius lay in new adaptations of the principles of mechanics or in new combinations of the elements of engineering practice in such way as to further the purposes in view. His mode of expression was the drawing-board. While he wrote vigorously and well, and while he was a frequent contributor in later years to scientific literature, especially on the subject of solar physics, yet his best and natural mode of expression was the graphical representation of his designs on the drawing-board. Forms and combinations took shape in his brain and were transferred to the drawing with marvellous speed and skill. Those who have been associated with him bear testimony that the amount of his work was simply astounding, and that only by a combination of the most remarkable celerity and industry could they have been accomplished.
These drawings were furthermore so minute in detail and so accurate in dimension that as a rule he did not find it necessary to give further attention to the matter after it had left his hands. Of the many parts of a complicated mechanism, one could be sent for construction to one shop and another elsewhere, all ultimately coming together and making a harmonious and perfectly fitting whole. In no other way could such astonishing speed in the detailed construction of the "Monitor" and other vessels of her type possibly have been made; and the fact that such speed in construction was obtained, and largely in this manner, is by no means the least impressive of the many evidences of Ericsson's genius as a designer.
The designs once completed on the drawing-board, however, Ericsson's interest in the work ceased in great measure, and as a rule he paid but little attention to constructive details, and took but slight interest in the completed whole. Thus he is said to have visited his "Destroyer" but once after she was built, and then simply in search of his assistant. He also declined an invitation from the Assistant Secretary of the Navy to visit Hampton Roads and inspect the "Monitor" immediately after her fight with the "Merrimac." He seemed to have no curiosity to inspect his work after it had left his hands, or to receive a report as to the practical working of his designs. This shows a peculiar lack of appreciation of the value of intimate contact with constructive and operative engineering work. No one could hope to avoid errors, or to realize by drawing-board alone the best possible solution of engineering problems. Ericsson wilfully handicapped himself in this manner, and might unquestionably have more effectively improved and perfected his ideas had he been disposed to combine with his designs at the drawing-board practical contact with his work as constructed.
His work was all done in his office at his house. For the last twenty-five years of his life he lived at 36 Beach Street, New York, where he wrought every day in the year, and often until far into the night. His office contained, beside his drawing-table and other furniture, a long table, on which at times, when overcome by fatigue, he would stretch himself and take a short nap, using a dictionary or low wooden box for a pillow.
His relations with his native land were always close, and, as already hinted, he gave much of his best effort to the study of means for her defence. Toward his friends and relatives he was the embodiment of watchful care and generosity. His private benefactions were for his means large, and were given with a whole-hearted generosity which must have added much to the love and esteem in which the recipients regarded him. His public benefactions were also notable, and during the later years of his life he gave away regularly no inconsiderable share of his income. Though gifted with reasonable prudence, he had no conception of the "business sense," and no capacity as a money-getter. After acquiring by his inventions and enterprise a modest competence, he devoted himself almost entirely to work less directly related to a financial return, and lived comfortably upon the principal which his earlier efforts had provided.
Ericsson had absolute faith in himself and in his mission to render available the energies of nature for the uses of humanity and civilization. His character was framed about the central idea of fidelity to this mission. He was dogmatic and optimistic as regards his own work; he had a contemptuous indifference to the work of others, and a disregard of the help which he might derive from a closer study of such work. He trained himself, body, mind, and affections, solely with reference to his mission, and allowed no interference with it. He was the embodiment of physical and mental vigor, prodigious industry, continuity of purpose, indomitable courage, capacity for great concentration of mind, and oblivion to all distracting surroundings. With such characteristics, combined with the rare endowment of mental capacity and insight regarding the principles of engineering science, small wonder is it that his life was one so rich in results. It could not have been otherwise, and the results simply came as a consequence of the combination of the characteristics of the man and the surroundings in which he was placed.
The question as to how much more or how much better he might have done had he possessed more faith in the work of others and a willingness to be guided in some measure by their experience is of course idle. Ericsson was a combination of certain capacities and characteristics; a combination of other capacities and characteristics would not have been Ericsson, and any discussion of such a supposition is therefore aside from the purpose of this sketch.
John Ericsson lived in a period of rapid engineering development and change. Old ideals were passing away, and the heritage which the Nineteenth Century was able to pass on to the Twentieth was in preparation. In this preparation Ericsson bore a large and most important part. So long as ships traverse the seas, Ericsson's name will be remembered for his work in connection with the introduction of the screw-propeller. So long as the memory of naval warfare endures, Ericsson's name will be remembered for the part which he bore in the transition from wood to iron, from unarmored ships to turrets and armor, from scattered to concentrated energy of gun-fire, and for his general share in the developments which have led to the ideal of a battleship prevailing at the opening of the Twentieth century. For these and for many other achievements he will be remembered, and his life and works should serve as a constant stimulus to those upon whom the engineering work of the present age has fallen, to see that with equal fidelity they live up to the possibilities of their endowments and opportunities, and serve with like fervency and zeal the needs of the age in which they are placed.
AUTHORITIES
Contributions to the Centennial Exhibition: Ericsson, John.
The Life of John Ericsson: Church, W.C.
History of the Steam Engine: Thurston, R.H.
Steam Navy of the United States: Bennett, Frank M.
Who invented the Screw Propeller?: Nicol, James.
The Naval and Mail Steamers of the United States: Stuart, Charles B.
A Chronological History of the Origin and Development of Steam Navigation: Preble, Rear Admiral G.H.
A Treatise on the Screw Propeller, Screw Vessels, and Screw Engine as adapted for Purposes of Peace and War: Bourne, John.
LI HUNG CHANG
1823-1901
THE FAR EAST
BY W.A.P. MARTIN, D.D., LL.D
INTRODUCTORY
Five years ago Earl Li was at the head of the "Tsungli Yamen," or Foreign Office in Peking. The present writer, having known him long and intimately, called one morning to request a letter of recommendation to aid in raising money for an International Institute projected by the Rev. Dr. Reid. "He's got one letter; why does he want another?" asked Li, in a tone of mingled surprise and irritation. "True," said I, "but that is from the Tsungli Yamen. Nobody in America knows anything about the Yamen. What he wants is a personal letter from you; because the only Chinese name besides Confucius that is known outside of China is Li Hung Chang."
"Ill give it! Ill give it!" he exclaimed, smiling from ear to ear at the thought of his world-wide reputation.
This was taking him on his weak side; but it was fact, not flattery.
Over forty years ago Li's rising star first came to view in connection with operations against the rebels in the vicinity of Shanghai, and from that day to this, every war, domestic or foreign, has served to raise it higher and make it shine the brighter. It reached its zenith in 1901, when after settling terms of peace with several foreign powers he passed off the stage at the ripe age of fourscore. What better type to set forth his age and nation than the man who, through a long career of unexampled activity, won for himself a triple crown of literary, military, and civil honors? In physique he was a noble specimen of his race, over six feet in height, and in his earlier years uncommonly handsome. The first half of his existence was passed in comparative obscurity at Hofei in Anhui, a region remote from contact with foreign nations.
It was there his character was formed, on native models; there he carried off the higher prizes of the literary arena; and there he became fitted for the rôle of China's typical statesman.
His career in outline may be stated in a few words. His native province being overrun by rebels, he passed from the school-room to the camp, and got his earliest lessons in the military art under the leadership of the eminent viceroy Tseng Ko Fan. The neighboring province of Kiangsu falling into the hands of rebel hordes a few years later, he won renown by recapturing its principal cities, by the aid of such men as the American Ward and the English Gordon. His success as a general made him governor of Kiangsu, and his success as governor raised him to the rank of viceroy, holding for many years a post at one or other of the foci of foreign trade north or south.
Beyond the borders of China he was twice sent on special embassies, and once he made the tour of the globe; but his most brilliant achievement was in twice making peace on honorable terms, when his country was lying prostrate before a victorious enemy.
It remains to expand this incomparable catalogue; but to make intelligible that remarkable series of events in which he bore such a conspicuous part, we must first invite our readers to accompany us in a historical retrospect in which we shall point out the opening and growth of foreign intercourse.
