Part 6 (1/2)

There is, moreover, much power lost as the oblique blades of the screw rise and fall in a vertical line while the vessel is heaving.

In the new edition (1855) of ”Bourne on the Propeller,” he says in the preface:

”Large vessels, we know, are both physically and commercially more advantageous than small vessels, provided only they can be filled with cargo; but in some cases in which small paddle vessels have been superseded by large screw vessels, the superior result due to an increased size of hull has been imputed to a superior efficiency of the propeller. No fact, however, is more conclusively established than this, that the efficiency of paddles and of the screw as propelling instruments is very nearly the same; and in cases in which geared engines are employed to drive a screw vessel, the machinery will take up about the same amount of room as if paddles had been used, and the result will be much the same as if paddles had been adopted. When direct acting engines, however, are employed, the machinery will occupy a much less s.p.a.ce in screw vessels than is possible in paddle vessels, and the use of direct acting engines in screw propellers is necessary, therefore, for the realization of the full measure of advantage, which screw propulsion is able to afford.”

Atherton says of the propeller in his ”Marine Engine Construction and Cla.s.sification,” page 45:

”Its operation has been critically compared with that of the paddle-wheel, under various conditions of engine power, and experience has shown that, under circ.u.mstances which admit of the screw propeller being favorably applied, it is equal to the paddle-wheel as an effective means of applying engine power to the propulsion of the vessel.” Again:

I recently addressed to Mr. Atherton the following question: ”Taking two s.h.i.+ps of the same _size, displacement, and power, or coal_, the one a side-wheel, the other screw: What will be their relative _speed and carrying capacity_ in smooth water? What in a sea-way, or in regular transatlantic navigation?” He replied under address, ”Woolwich Royal Dock Yard, 14 Sept., 1857:

”It is my opinion, based on experiment, that a well-applied screw is quite equal to the paddle-wheel for giving out the power by which it is itself driven, that is, in smooth water. I can not say from observation or experience what is the comparative operation at sea.”

I addressed the same inquiry to Mr. Robert Murray, of Southampton, who has written an able work, ent.i.tled, ”The Marine Engine,” and who is considered excellent authority, and have from him the following reply, dated Southampton, 19 Sept., 1857:

”With regard to the relative efficiency of the paddle-wheel and screw for full-powered mail steamers, I am disposed to prefer the paddle-wheel for _transatlantic_ steaming, in which the vessel has to contend with so much rough weather and heavy sea, and the screw for the Mediterranean and the Pacific routes.

”For auxiliary steamers of any kind the screw has manifestly the advantage.

”With regard to the actual speed obtained from each mode of propulsion in vessels of the same power and form, and with the propeller in its best trim, I am disposed to prefer the paddle-wheel, either in smooth water, or when steaming head to wind, but in other conditions the screw.” What he means by ”other conditions,” is evidently when the screw is running with a fair wind, which is seldom, so as to use her sails. Bourne also states very clearly in two places that the propeller is by no means so efficient in a sea-way, as a side-wheel steamer, and admits that when a vessel is steaming at eleven or twelve knots per hour, the sails not only do not aid her, but frequently materially r.e.t.a.r.d her motion. (_See Bourne, page 237._)

All of these authorities agree that the application of a given power produces about the same effect, whether through the side-wheel or the screw; and if so, it is evident that the screw can not attain the same speed as the side-wheel, without burning as much fuel, and having as costly and as heavy engines and boilers. Indeed, taking the whole evidence together, it appears well settled by these authorities, that the screw is equal to the side-wheel only in smooth water, and that, as a consequence of this distinction, it is not equal to it in general ocean navigation. It has been seen that much of its power is lost when it contends with head-winds and seas, and that when it has attained a fair average mail speed, the wind will help it very little, if any, under the most favorable circ.u.mstances. It is, therefore, reasonable to infer that it would cost more to attain a high average mail speed with the propeller than with the side-wheel. If in attaining this average mail speed the advantages are clearly in favor of the side-wheel, there is no hope that we shall accomplish the mail service at cheaper rates than heretofore, as this agency can not be introduced toward that end; for not only is the prime cost of the steamer the same, as also the consumption of fuel per mile, but there are other and numerous disadvantages connected with the propeller, which are wholly unknown to the side-wheel.

It is a well-known fact that propellers are compelled to be placed upon the docks three or four times as often as side-wheels. The screw either breaks, and must be replaced by another, or it cuts the boxes out, or works the stern of the vessel to pieces. Any one of these requires that the steamer shall be docked, however great the expense; and as these accidents are constantly occurring in even the best constructed and best regulated propellers, it follows that they must be constantly on the docks. This species of vessel being built necessarily narrower than the side-wheel, it rolls more, and is found to be an exceedingly disagreeable pa.s.senger vessel. Propellers have become deservedly unpopular the world over; and if it were possible for them to be faster than the side-wheel, it is hardly probable that first-cla.s.s pa.s.sengers would even then go by them, as they are known to be so exceedingly uncomfortable.

The propeller, I have before said, is erroneously supposed to run more cheaply than the side-wheel. I think that I have shown that as a mail packet it will cost more to run it at a given speed. But there are certain cases in which it does run more cheaply; these are, however, only where the speed is low, and the machinery not geared, and where, as a consequence, sail can be used to more advantage than on a side-wheel. The economy is not the result of the application of the power by the screw, as compared with the side-wheel, but of the sail alone; and this economy is more or less, just as canvas is employed more or less in the propulsion. The screw is the better form of steamer for using sail; and the low speed at which propellers generally run, is a means of making that sail more effective. We have already seen, in the section on the cost of steam, that it generally requires twice the original quant.i.ty of fuel to increase the speed from eight to ten knots per hour in either style of steamer. Now, it is a well-known fact that the transatlantic propeller lines are on the average more than two knots per hour short of the speed of the side-wheels, which makes their pa.s.sages across the Atlantic from two to six days longer than by the mail packets. They thus save from one half to two thirds of the fuel, and deducting its prime cost from the bill of expenses, they add to that of receipts the freight on the cargo, which occupies the s.p.a.ce of the coal saved. They consequently run on much smaller expenses; but only when their speed is less than that of the side-wheels, and far too low for effective postal service. Economy thus purchased at the expense of speed may do for freight, and enable propellers to derive some profits from certain cargoes; but it can never subserve the purposes of mails and pa.s.sengers. It must alway be recollected that the effective speed of the propeller is reduced just in the ratio of the greater economy as compared with the side-wheel.

It thus appears that with any appreciable economy the propeller must be slower than the side-wheel; and that with any considerable economy it can be but little faster than sail. It has, however, the advantage over sail of being rather more reliable and punctual, and can make arrivals and departures rather more matters of certainty. This at the same time secures to it a better cla.s.s of freights as well as vast numbers of emigrants which together, enable it to incur the extra expense over a sailing vessel. The cargo is less in the propeller than in the sail, as much of the room is occupied by the engines, boilers, and fuel. Hence, the prices must be proportionally higher to meet the deficit arising from the smaller quant.i.ty. But there are very few trades in which propellers can run as noticed on so long a voyage as 3,000 to 4,000 miles; and these lie between a few countries in Europe and the ports of the United States. Their support arises chiefly from the emigrant trade; as without this their freights would not on any known lines enable them to run one month. And this is not simply an a.s.sumption of theory, but the experience of all the European lines. I was recently told in England and France by many persons who had no interest or desire to deceive me, that propeller stock was invariably a burthen to every body having any thing to do with it, and could generally be bought at sixty to seventy cents on the dollar, while much of it would not bring half of its cost price. They cited as an evidence the fact that no line of propellers is permanent, unless in some way connected with a subsidized company, as in the case of the Cunard screws running between Liverpool and New-York. The Glasgow line is also an exception, and is said to pay dividends. The screw lines are always hunting a home and a new trade. (_See views of Mr. Murray, page 111._)

The only way in which some lines can run is by getting their stock at half its value and thus having to pay the interest on a smaller sum.

The ”General Screw Steam s.h.i.+pping Company” is an example. The Company had from the first lost money, although they had nine fine steamers, and were compelled finally to close up and sell out. Mr. Croskey, the United States Consul at Southampton, supposed that they might be put into a new trade and make a living on a smaller capital stock; that is, if the new company should get them at half their value. The transfer was made and the ”European and American Steams.h.i.+p Company”

was established. Some of the vessels were put into the trade between Bremen and London, Southampton, and New-York; some between Antwerp and Brazil; and some between Hamburg and Brazil. None of these lines have paid, except, perhaps, the New-York, which has had large cargoes of emigrants; and Mr. Croskey freely acknowledges that the new Company would have been ruined but for the Indian Revolt, which enabled him to charter five of the vessels to the Government at good prices, for the conveyance of troops by way of the Cape of Good Hope to India. Had the lines on which they were running been profitable they would never have been chartered to the Government. But like the whole propeller service of the world, this Company took the chances; and it may be safely a.s.serted that but for the opportunities which vessels of this cla.s.s find for chartering to the Government they could not live on their own enterprise three years. The number of these vessels is now very unnecessarily large; and many of them have been built to supply labor to the establishments, and for taking the chances of Government employment at high prices. Their largest employment results from casualties rather than from the pursuit of legitimate trade. But the business is overdone, even for the English market, when foreign war is rather the rule, and peace the exception. But few propellers are now building; these few being small and intended for the coasting, or the short-line Continental trade, where they will readily pay. (_See page 42 for propeller stock; also pages 44 and 45 for the propeller coasting service._)

It does not materially alter the complexion of this question to say that propellers are generally constructed of iron. There is not such a difference in their prime cost or their stowage capacity as to enable them to take the large receipts necessary to their support; while certainly there is no advantage to be gained in speed from iron as a material of construction. The iron propeller can be constructed cheaper than the wooden in Great Britain, because of the great scarcity of timber and the large and redundant quant.i.ty of iron; and an iron vessel has some advantage in being able to stow a larger cargo, from the fact that her sides and bottom are not so thick as those of wooden vessels; but these considerations do not very materially affect the consumption of fuel, and the quant.i.ty necessary to carry a ton of freight. Iron is probably a better material than wood for the construction of propellers, as the part about the stern, where the screw works, can be made stronger, and as all iron vessels can be rather more readily divided into water-tight compartments by bulkheads. Yet as a material of construction it offers no transcendent advantages over the side-wheel for transatlantic navigation, while it is not probably so safe, or so comfortable for pa.s.sengers. Yet, it will be well for us to adopt the propeller largely in our coasting trade, and iron as the material of its construction.

We have thus seen that to save fuel and carry freight, the speed of the propeller must be low; indeed very low, if it is to live on its own receipts. It is therefore clearly impossible that with such comparatively low speed it should carry the mail. Neither can it support itself except by this low speed. By running thus but a fraction faster than the sailing vessel, it can command on a few prominent lines a large freight; but to give vessels of such speed a subsidy for carrying the mails would be both to render the mail service inefficient, and to enable the propeller to compete with the sailing lines of the country at very undue advantage, which would be an unfair discrimination against all sailing interests. Should the propeller, like the side-wheel, run fast enough on the average trips of the year to carry the mails, which would certainly be at the expense and abandonment of any considerable freighting business, then the Government might with propriety pay for the mails, as these steamers would not injure the freighting business of sailing vessels.

The outcry by sail owners against steamers as compet.i.tors can not be against the mail packets; for these carry but little freight; but against these slow screws which should be treated like all other freighting vessels, notwithstanding the fact that some of their owners have had the impudence to propose them for the paid mail service and to ask a subsidy from the Government, but the better to cripple the interests of sailing vessels. As well might Government subsidize fast clippers, because they are a little faster than regular, ordinary sailers. When the steamer runs with sufficient rapidity for the mails, the sailing s.h.i.+p has nothing to fear from compet.i.tion, and has all the benefits of the more rapid correspondence. Thus, Government must pay only where there is a fast mail, whether it be in a side-wheel or propeller; otherwise it destroys individual compet.i.tion and cripples private enterprise.

If, as we have seen from all the facts regarding the expense of running steamers, individual enterprise can not supply adequately rapid ocean postal facilities, and if such facilities are yet wholly indispensable to the commerce, the people, and the Government, the only alternative presented is for the Government to pay for them, and to require, as it has of all the American lines, such a speed as to prevent injurious compet.i.tion to sailing vessels and private enterprise. Much capital is made by certain s.h.i.+p owners out of what they call the undue discrimination of subsidies against their vessels; but they can never lay this charge at the door of the fast and very expensive mail packets, or elsewhere than upon the slow auxiliary propellers which any of them have a right to attempt to run, and which the Government never did and never will subsidize. This is the source and the only source of all the vaunted injurious effects of steam on the sailing stock of the country. It is a question with which the Government has nothing to do, and which must be settled between propeller owners and sail owners themselves, and with reference, perhaps, to the wishes of their customers. Mail steamers have enough to do to get money to pay their coal, provision, repair, and innumerable extras bills, without wrangling over the freighting business. And, from all this we conclude that the only means of the Government securing an adequate mail speed is by paying for it. (_See remarks of Committee on this subject, Paper E._)

SECTION VII.

WHAT IS THE DUTY OF THE GOVERNMENT TO THE PEOPLE?

RESUMe OF THE PREVIOUS SECTIONS AND ARGUMENTS: IT IS THE DUTY OF THE GOVERNMENT TO FURNISH RAPID STEAM MAILS: OUR PEOPLE APPRECIATE THE IMPORTANCE OF COMMERCE, AND OF LIBERAL POSTAL FACILITIES: THE GOVERNMENT IS ESTABLISHED FOR THE BENEFIT OF THE PEOPLE: IT MUST FOSTER THEIR INTERESTS AND DEVELOP THEIR INDUSTRY: THE WANT OF SUCH MAILS HAS CAUSED THE NEGLECT OF MANY PROFITABLE BRANCHES OF INDUSTRY: AS A CONSEQUENCE WE HAVE LOST IMMENSE TRAFFIC: THE EUROPEAN MANUFACTURING SYSTEM AND OURS: FIELDS OF TRADE NATURALLY PERTAINING TO US: OUR ALMOST SYSTEMATIC NEGLECT OF THEM: WHY IS GREAT BRITAIN'S COMMERCE SO LARGE: CAUSES AND THEIR EFFECTS: HER WEST-INDIA LINE RECEIVES A LARGER SUBSIDY THAN ALL THE FOREIGN LINES OF THE UNITED STATES COMBINED: INDIFFERENCE SHOWN BY CONGRESS TO MANY IMPORTANT FIELDS OF COMMERCE: INSTANCES OF MAIL FACILITIES CREATING LARGE TRADE: THE PENINSULAR AND ORIENTAL COMPANY'S TESTIMONY: THE BRITISH AND BRAZILIAN TRADE: SOME DEDUCTIONS FROM THE FIGURES: CALIFORNIA SHORN OF HALF HER GLORY: THE AMERICAN PEOPLE NOT MISERS: THEY WISH THEIR OWN PUBLIC TREASURE EXPENDED FOR THE BENEFIT OF THEIR INDUSTRY: OUR COMMERCIAL CLa.s.sES COMPLAIN THAT THEY ARE DEPRIVED OF THE PRIVILEGE OF COMPETING WITH OTHER NATIONS.

1. _Conceded_ (Section I.) _that steam mails upon the ocean control the commerce and diplomacy of the world; that they are essential to our commercial and producing country; that we have not established the ocean mail facilities commensurate with our national ability and the demands of our commerce; and that we to-day are largely dependent on, and tributary to our greatest commercial rival, Great Britain, for the postal facilities, which should be purely national, American, and under our own exclusive control:_

2. _Conceded_ (Section II.) _that fast ocean mails are exceedingly desirable for our commerce, our defenses, our diplomacy, the management of our squadrons, our national standing, and that they are demanded by our people at large:_