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l'artial opening of the Liverpool and -/ttanchesle~. Rail-wa~j [From the blanehester Mercury.] [~ con.~equence of its having been announced, for a week or two in the ncwst~aoers~ that the directors of the IAverpool and Manchester Rail-wa~ i'ntended, on Monday last, to proceed in a earri~ge~ propelled by a locomotive engine, from Liverpool along the whole len,,t i of th- line to hold their first Board in Manchester, a great concourse of people assembled. At five minutes past eleven thedirectors and some of their friends, with the resident engineers, in all about fol'ty~ arrived m two carriages, lhe engine used o the oc~casion was a new one~ constructed by Messrs. St ephens.on?, and designated the Arrow. In addition to its own weight~ w~th its appendages for the sunnlv of water, &c. 7 tons, it drew behind it seven wagons, laden ~vlth stones~ weighing ~7 tons, behitad these~were stationed two coaches, containing the directors and tl~eir., friends, weighin~ 5 tons more~ makin~ a total weight of ,59 tons. With this wetght the engine compassed the dtstance (rather more than thu.ty miles) in two~ho~rs and one v~inute~ exclusive of 19 minutes taken up in stoppages ibr the necessary supply of fuel and water. •
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[From the Liverpool Mereury.] The directors (on their return to Liverpool) filled with their fi'iends two eoaehea~ which darted through the dense mass of:~!~dividuals who thronged the rail-way, passed over Chat Moss a ~ h e rate 0f about 2~ miles an hour~ and arrived at Edgehill, Liverpooli:,~aft¢i, deducting seven minutes for stoppages)in one hour and thi~itSV.~nl. nutes. The average speed on the return from Manchester was20 miles an hour, and in passing over Chat Moss~ the carriages proceeded, for a time, at the rate of 27 miles! [From the Liverpool Times.] The steam carriages vary in their size and plan; some have:_two bodies and others three; some are intended to accommo~!ate four persons in each body, anti others six; and some have ~/~eii't~al cdm. artment, which will contain six persons, with seats before/~nd:~e~ ind, and two other compartments are in front, andbne'in~ihe~3~r, each of them resembling a post chaise, with windows in'fr~t,~and containin~ only three persons. The seats, whichacComm0date tht~ee persons e~ch, are, at l~ast, twice as wide as a tbur inside stagecoach, so as to allow the same space for three as is now allotted to four. Between the sittings is a rest for the arms, anti each passenger has a cushion to hirt~self: there is also a little projection against which he may rest his head; and tile backs are padded and covered wittl line cloth, like a private carriage, so that the passenger may sit;tigd sleep with as much comfort and luxury as if he ~ere~itr~:t~':ea~y chair or on a sots. The external appearance of the eoaehes:is nead~, equal to that of a handsome carriage. There are no outside passen. ~ers on these vehicles, and they carry no luggage~ but for theist-
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~'.e,lzc*~gs * ~ Iroit II&zle,, Pipes.-- Q'aerie~ Jor
comumdation of l)otlb there is a dill?rent kind of carting% about as high as a common cart, and having four or six rows of seats, under. which there arc receptacles tor the luggage. The passengers by these conveyances will be not nearly so elevated nor so much exposed to the danger of tMling off as the outside passengers on a stage coach. It is probable that one or more of the latter vehicles wilt always accompany the coaches. There are also light wagons prepare(t for the ;zonve'canee of bales of cotton--an article of wlfich the quantity trausporte[l will be immense.
Ccme~tsJbr 1ton Water Pipes.
M..GuJ~'~Am), in an interesting statement of the introduction o f water into the city of Grenoble, says that the mastic which he h a s employed to connect the pipes, has been known for some years, b y the name of.qquin. Most of the recipes vary, and those which he had obtained directly from Vienna, Lyons~ Paris, and by correspondence fi-om London, do not answer his purpose. For this reason he commenced a series of experiments, and found the following COmlposition, acquired the hardness and compactness of good cast iron. [ mingle ninety-eight parts of cast i,'on filings (l)ounded turnings) passed t~l~rou~,h a coarse sieve, and not oxidized, with one part o f tlm~ ers of sulphur. When intimately mixed~ I take one part of salammoniac~ aml dissolve it in boiling water; and pour this sdution on the p,'cceding mixture and agitate it thoroughly. The quantity of water ought to be such as to reduce the whole to the consistency of common mortar. This cement disengages a great (luantitv of beat and ammonia, and should be imnmdiately used. "It is pq'essed fi)rcibly into the joints, and after th'ving two or three days iu the open air in summer~ and from seven to eight days in winte,', the pipes may be covered, with an assurance ol" their sdidity. In all the basins or reservoirs of the city, he used only this cem(_'.nt~ and the joints prove to be as tight as if cast iron had been melted al,d poured into them, or as if the cisterns were made of glass. They stand in no need of repairs. lie recommends this cement in all cases of Imwn stone and o t h e r solid , orks exposcd to the weather~ as in bridges, aqueducts~ cmLdnits~ &c, [,3nmtles des Mines. Queries. A eom~t.~seo,~m.~NT requests infbrmation on tile lbllowing points. On what descent shouhl a rail-road be constructed, one4hird oI the trade being ascending, and two-thirds descendirJg, to be used with the greatest economy of power. What is the greatest ascent on which a locomotive will draw up four times her own weight, and the rules for calculating such ascent.