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Mechanics' Magazine, MUSEUM, REGISTER, JOURNAL, AND GAZETTE.

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BELGIAN LOCOMOTIVE ENGINE. [Translated from the Bulletin du Musée de l'Industrie of Brussels, for the Mechanics' Magazine.]

When one advance has been made in gine-driver. The whole of the details, any department of art, others are sure to in short, of this machine bear the stamp follow fast; the human mind is ever on of difficulty overcome, for almost every the alert, to improve and perfect its separate piece exhibits some improveacquisitions. M. Arago shrewdly pre ment. The danger attending an undue dicted, some years ago, that it would be elevation of the passenger carriages has long before we should hear the last of been avoided, by placing the seats on a railways. He was not mistaken in this, level with the wheels ; the wheels themthough certainly he did very wrong to selves are so constructed, as not to be make use of that as an argument for liable either to shrink or break from postponing the extension of the railway changes of temperature ; and a much system in France; to act so, was to con improved system of springing has been vert progress itself into an obstacle to adopted in the buffers. progress.

Ñ. Deridder's engine, (from its comSeveral journals have already noticed bination of great power with extreme the new locomotive of M. Deridder, lightness,) renders it now practicable to called, from its economical properties, have railways of almost any gradients. “ The Economy;" and, if we mistake Railway making will, in fact, become renot, this invention is destined to mark a duced to a matter of mere surface levelnew era in the history of railways. ling, which will allow of a vast saving

Already many experiments have been in the purchase of land, in embankments, made with this locomotive, on the railway masonry, the length and thickness of from Brussels to Tübise. On the 13th of sleepers, &c. The rails, too, may be reJuly, 1841, it drew, on inclines of 1 in duced in weight, from 50 lbs. per yard to 250, 1 in 333, and 1 in 500, between 25 lbs. ; and, by an improved mode of these two localities, six wagons, carrying construction, chairs may be entirely dis7 tons 8 cwt. of goods and 15 passengers,

pensed with making altogether a load of about 9 tons We have only to add, that the justly 9 cwt. The journey of 48 miles 12 fur celebrated English engineer, Mr. Robert longs, (going and returning,) was per Stephenson, who was present with seveformed in 80 minutes, and the consump ral Belgian engineers at the trial before tion of coke was only 2 cwt. I qr., or mentioned of the 13th of July last, fully 32 lbs. per league of 3 miles 34 poles. recognizing all the advantages of this

This machine bears to ordinary loco new system, addressed a few days after a motives about the same proportion as the letter to M. Deridder in the following horse to the elephant; and, like the light terms: but powerful courser, it is guided and “Sir,—Since I had the pleasure of being controlled at pleasure.

present at the experiment with your locoEach driving-wheel has but the weight motive and its train of carriages, I have of one ton to support, instead of three, as maturely considered the reasons on which in the case of the ordinary locomotive. your new railway system is founded, and of The engineer has three different degrees the effect which it would have in diminishing of power instantaneously at command, to the capital necessary for railway under be used according to the inclination of takings, and thus placing them within the the rails and the load; he may work

reach of districts of comparatively limited either with half steam on, or full steam,

traffic. or at any intermediate degree of pressure.

“I participate entirely in your ideas as to The same carriage frame includes both

the principal details of this new mode of exengine and tender, which obviates the

ecution ; it is not to be doubted, that from

the moment its advantages begin to be fully necessity of having flexible tubes to con

appreciated, public opinion will force on its vey the water to the boiler. The cylin

universal adoption. der, and all the rest of the machinery, " This system seems destined to unite with are under the eye and hand of the en the great lines of communication, numerous

seats of business of secondary importance, • A new quarterly journal, of excellent promise, to

which, though commercial and populous, which we wish every possible success.-En. M. M. could not make an adequate return on such

FIRE PREVENTION-WOOD RENDERED FIRE PROOP.

115 large capitals as are indispensably required quisite to protect wood from fire, and to for the formation of railways on the present thwart in a great measure the destructive system.

progress of the “ devouring element" at Many railways which have been under

one hundreth part the expense attendant taken on a larger scale than there was com

on the Colonel's plan, I must entirely mercial traffic to justify, would, nevertheless, have paid well, had your system, to which I

dissent from the adoption of that plan. am decidedly favourable, been adopted.

I know a cotton factory, whose eight " It only remains for me to add, that the

floors, containing each 600 square feet of examination of your locomotive and your

wooden surface, have been as effectually wagons has given me much satisfaction ; fire-proofed, at an expense of 2s. 6d. the disposition of the mechanism is distin each foor, as though they were metal, guished by more than ordinary ingenuity ;

and have several times resisted the action and I have no doubt, that the application of fire, as completely as though they which you have made of the plan of working were wetted with water. Now, Sir, the steam expansively, will be attended with a capability to do this surely deserves atsaving of about 40 per cent. in the consump tention, and the object of this letter is to tion of fuel.

bring the same under the notice of some I am, &c.

capitalist, who may be willing to secure Robert STEPHENSON.

an interest by patent in so valuable a [The preceding article is accompanied discovery. In the above instance of proby an engraved elevation of the ** Eco tection 4,800 square feet of deal were nomy," which we have copied on a re made to resist fire at an expense of 20s., duced scale on our front page, but no and so complete is the effect of this reother explanatory engravings or details are medy, that wood so treated will not burn given, so that after all that has been said with flame, nor will its carbon ignite -by our worthy brother Editor of the like other carbon; and if air be blown Bulletin, and our esteemed countryman upon wood so prepared, and thrust into Mr. Robert Stephenson, the reader is

a fire at bright red heat, it is kept cool still left to guess, if he can, and to and prevented from burning. Nobody wonder at all events, what the new im will, I think, attempt to deny, that the prinprovements are, by which M. Deridder

cipal sources of fuel in "fires" generally has so far outstripped (as alleged) all are the floors, and therefore, if these are preceding locomotive builders. It is of

once protected from kindling, all chance great lightness certainly, this Belgian of a destructive fire will be avoided. engine; but light engines, capable only of The process is so simple and so easy drawing correspondingly light weights (as of application, that it can be applied to seems to be the case with the “Economy") wooden fittings after erection in one day, are no strangers to English railway prac provided they are free from paint, and if tiee. We have no desire to disparage we may reason from analogy, wood so M. Deridder's achievements, but must prepared, can never undergo the action wait for further information, before we of dry rot. After simply inviting such can subscribe to all that is here said in of your readers as are able and willing to their favour. En. M. M.]

spend a little money in a project which must certainly be lucrative, and stating

that I shall be happy to convince any FIRE PREVENTION-WOOD RENDERED honourable individual so disposed of the

tangibility of this process, I shall conSir,--Having read in your 963rd Num clude, with soliciting your instrumentaber, the observations and arguments of lity in aid of this object. Mr. Baddeley and Colonel Macerone on

I am, Sir, the subjects of fire extinguishing and fire

Your obedient servant, prevention, I must beg of you to insert

W. R. in your journal my approval of the utility Southwark, January 31, 1842. of being constantly provided with means [Another correspondent (W. M. S.) ready to be put into immediate use; and who writes from Staffordshire, professes I must particularly assent to the valuable also to have discovered a very harmless maxim of the Colonel, “that prevention and cheap ingredient for rendering timis better than cure;" yet considering that ber, linen, cotton, paper, &c. fire-proof. I am in possession of the knowledge re A specimen of linen thus treated has

PIRE PROOF.

been forwarded to us, which is quite in and to the canvas of theatrical scenes, at capable of burning with a fame. The Naples, so far back as 1811. Moreover, process is represented as consisting simply I wrote on that subject, and on Hartley's of immersion in a liquid and hanging plan, and on iron staircases, to the Times out to dry; the act of mangling or ironing and Chronicle, full twenty years ago. afterwards does not lessen the effect. Five years ago, I wrote on the same

Any communication for W. R., is matters to our Mechanics' Magazine, requested to be addressed to the care of with the addition of instructions to ren. the Editor of the Mechanics' Magazine.] der quite incombustible the thatch of

cottages, barns, in fine, all thatch, by saturating the whole straw with common

whitewash, with a pound of alum to a PREVENTION OF FIRE-COLONEL MACE pailful. RONE IN REPLY TO MR. BADDELEY. Neither in my article to which Mr.

"Think'st thou, because thou 'rt honest, we shall Baddeley objects, nor in any other, have have no more cakes and ale?"

I denied a fact of which I knew, or Sir,-In No. 964, there is a letter know, nothing, i. e. Mr. Baddeley's havfrom Mr. Baddeley, animadverting upon ing written to you about any other premy previous week's communication to you, ventive from fire, save and except his on the prevention of fires. I should not warm eulogium on the “ Patent Firehave troubled you with this little no proof Cement."

I will not forget to tice, were it not for the very high esteem mention, that I have also proposed to in which I hold the talent, benevolence, soak deal boards in a strong solution of and diligence of Mr. Baddeley, with alum, and also to paint them with a paint whom I should regret to have any differ composed of linseed oil, colour, soap, and ence of opinion, on matters of fact and alum. The surveillance which I recompublic utility. Mr. Baddeley says, that mend to prevent architects and builders he is "sorry

" that the shortness of my from placing their fire flues in juxtamemory should have betrayed me so position with the deal boards and other much into error on the subject of fire timbers of houses would not, in my opi. prevention. I do not impugn the cor nion, be, as Mr. Baddeley calls it, "an rectness of Mr. B.'s statement, as to his outrageous infraction of the liberty of the having suggested in your pages the iron subject.” There are innumerable laws staircases, " antiphlogistic" plaster, &c. existing, which, for the (at least preBut this I can state, that I have never tended) benefit of the community, sorely seen any thing of his, save on the proper infringe upon the lieges' liberties. Take use of fire-engines, the supply of water, for example the whole body of the Ex&c., and excepting his eulogium of the cise Laws—the laws against free trading bubble patent cement, the first experi. (in many commodities) free sporting, ment on which I saw exhibited on a free speaking, &c. But the list of such doorless, windowless, curtainless, little laws would cover far more paper than I house in South Lambeth, before a number have at my disposal. At any rate, the of scientific gentlemen and directors, in insurance offices ought to resist the paythe summer of about (I think) four years ment of all sums claimed for damage ago. I was there the day before the done through such reckless and stupid

triumphant" experiment; I saw the arrangements of fire-flues and deal boards, cement laid on the ground floor door as have lately destroyed the Houses of ways. I took a portion of it home with Parliament, the Royal Exchange, the roof me, and found it to consist of Roman of the Reform Clubhouse, and several cement, size, and alum. I saw the tubs stately mansions. of Roman cement, those of size, and

Yours obediently, others, which, not being open, I cannot

MACERONE. swcar contained the alum. True, in my last letter I forgot to mention the alum.

P.S.--I will send you an account of But on the subject of anti-combustion

the experiment at the South Lambeth appliances to timber, thatch, and linen,

house, which I witnessed. * my memory has not “betrayed me so far" as to make me forget that I applied

• [This experiment was described at the time, a solution of alum to dimity curtains,

by Mr. Baddeley, in our 778th No. En. M. M.]

PRACTICE AND PRACTICIANS, V. MATHEMATICS AND MATHEMATICIANS. 117 PRACTICE AND PRACTICIANS, V. MATHE conceive that there may be a vast differ

MATICS AND MATHEMATICIANS-S. Y. ence between what he intended and wha IN EXPLANATION.

he performed. Let us examine. [We stated last week, in our Notices to Correspond.

ents, that we declined inserting this letter, be In No. 956, Mr. Cheverton, speaking cause, in our judgment, it exceeded the limits of free discussion. The writer has since given us

of Mr. Pilbrow, says, “not perhaps that permission to leave out the parts we considered he himself is a mathematician, but an inparticularly exceptionable, and it is now published

stance, not at all uncommon, of the banes with these parts omitted. What remains will, we have no doubt, be quite suficient to vindicate the ful effect which a blind indiscriminating writer from all suspicion of having intentionally admiration of the science, or even an immisrepresented Mr. Cheverton.-Ed. M. M.]

bibing of the spirit of the science, has Sir, I should have thought Mr. Che. generally upon our modes of thinking verton might have managed this discus and reasoning." And in the note apsion without parading his own notions of pended, it is said, “As a curious inhonesty, or attacking mine; but as he stance of the influence which this seience has not chosen to do so, I must explain indirectly exerts, not indeed in producing that, when he quoted somebody's censure baneful effects--for that is too sober a in No. 959, I was led to suppose it might word—but in leading a writer into a be his own, by his remark, that the display of ludicrous pedantry and sowriter " appeared to know me well;" lemn foolery,&c. &c. May not any, which remark struck me as being dis science which does even this—and I could creditable to Mr. C. For, as he and I quote many other charges of a similar are total strangers to each other, I did description-be fairly called a noxious not see how it was possible for him to science. The spirit of the science is have had any opportunity of forming distinctly charged, in the first of the such an acquaintance with my character above passages, with having a “baneful istics, as could justify his saying whether effect" upon our modes of thinking and I was, or was not, apparently well known reasoning; and the passage from the lo a third person ; and I consider a Commissioner's report is cited to prove strictly honest man would not give an the worse than buneful influence which opinion upon any subject upon which he " this science indirectly exerts,” and had never possessed the necessary means NOT as an instance of the ludicrous, of forming one. But I suppose Mr. C. rather than the baneful effects of imbibtakes a different view of the matter; ing the spirit of the science,” &c., as otherwise, he would probably have Mr. C. mis-represents in No. 963. adopted a lower and more discreet tone Again, the baneful effects are clearly derespecting “ blunted perceptions," and scribed, in No. 956, as arising from all the other offensive personalities, with this science," and from an " imbibing out the aid of which, it would seem, he of the spirit of the science," and NOT as knows not how to conduct his defence. "flowing from a blind indiscriminating

Mr. Cheverton's paper in No. 956 ap admiration of it," as is erroneously as peared to me an attack upon the mathe serted in No. 963. I have here pointed matics, and when I read it, I thought out the true meaning of the passages reasoning would be wasted upon such a quoted, which no reference to the conproduction, and that to make its weak text, as it exists in No. 956, can alter; ness manifest, nothing more was neces and if any one doubts that I have done sary than to place the contradictory as so, I beg he will be good enough to refer sertions conspicuously; or to change the to page 442, and judge for himself. If terms in which the statements Mr. C. had merely pointed out the ill made, so as to state an extreme case, of effects of a blind, incautious, and imprecisely the same nature as that de

proper application of the pure science to scribed in cach of Mr. C.'s charges practical purposes, no one would have against that science; and I suppose, by been more ready to commend him than I his being so very angry, he feels that in should ; but I consider he did not do so. No. 958 I have succeeded in exposing the errors of his paper.

I am, Sir,

Your obedient servant, But Mr. C. denies that he intended to

S. Y., (an Engineer.) attack the science ; and seems unable to

January 24, 1842.

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