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Show JPQPULAR I SCIENCE . Atlantic Liner Turbine Predicted. In tho English Channel on Juno 27 tho new turblno steamboat, the Queen, mado her final trip before being placod In commission. Tho averngo, speed wns upward of twenty-three knots. Expressions ot satisfaction were general. Tho vessel afterward took her placo on tho regular schedulo from Dovor to Calais In connection with tho London-Paris sorvice. Persons Per-sons who wero on .board on her trial trip predicted n turblno Atlantic liner within two or threo years. C. A. Parsons, Par-sons, tho Inventor of tho turblno en-gtno, en-gtno, Is confident ho can clip a full knot off tho best Transatlantic speed record whenever ho shall havo n chnnco to mako a test of his invention on so largo a scale. Horseshoe Clamps Over the Hoof. Thero is Just ono good reason why a horso bhouhl havo steel shoes nailed to Its hoofs to prevent them from wearing out rapidly while tho patient animal la covering tho miles of strcots and country roads which Its owner compels It to travorso for his own business or pleasure. That reason Is tho falluro of tho inventor to dlsco jr a moro practical means of attaching the shoos to tho feet. It Is woll known Needs No Nails to Fasten (t In Place, that onco In a whllo a nail splits or turns whllo being driven Into tho hoof, causing It to enter tho tender uppor portion' and temporarily crippling tho animal. Then, too, tho shoes aro apt to get looso on tho feet, and may strain the tendons of tho leg before the driver discovers that anything is wrong. If the Inventor of tho natlless borseshoo shown In tho drawing has succeeded in designing a shoe which will take tho place of that which has been In uso for so many years ho will bo assured of finding plenty of drivers driv-ers Teady to give it a fair trial. The wearing surface of this shoe differs from the ordinary kind' only In being minus the nnll holes, but at tho front and ends of tho new shoo will be seen metallic straps rising to a common point near tho top of tho hoof. These straps are hinged to tho shoe, and are connected at tho ends by a threaded bolt, which can bo turned with a small wrench to clamp tho straps over tho hoof. It Is necessary that the bottom of tho hoot bo pared down ovonly before be-fore tho shoe Is put In placo In order that a smooth fit may bo Insured, but aside from this thoro Is llttlo work required re-quired to put on a set of these shoes, and this suggests the Idea that tho horse mav yet havo Its shoes put on In tho morning and removed at night to rest the feet. Joslab Serfnss of Hazlcton, Pa., is the lnvontor. Feedbag for Horses. The horse fancier may advance the argument that an automobile has to bo fed at froquont Intervals as well as tho horso, but tho auto "flond" will reply that bis machine docs not waste Its feed, as tho majority ot horse are sure to do. If tho horseman should chance to have one ot tho dovlces which we hero Illustrate, with which to feed his horso, ho can easily prove that the argument Is false, for it Is tho special purpose of this Invention to savo tho grain Instead ot allowing tho animal to throw a largo portion ot MM Discharges Grain Slowly and Prevent Waste. It on tho floor of his stall, or on tho pavement It being fed whllo on tho road. The horso has no chance to swing its head away from tho rccep-taclo rccep-taclo In which tho feed Is placed, and, consequently, whatever drops from Its mouth falls dlroctly back into the receptacle It will also bo soon that tho feed Is not poured directly into tho eating trqugh, but Is placed in a tubular hoppor dopondlng from tho animal's neck, finding Us way slowly Into tho trough through a pocket at ono sido. As tho foedlng apparatus is suspended from the nock nnd does not Cepond on the bridle for support it will not lnterforo with free movement of tho animal's jaws whllo eating George II. Nlssen of Brooklyn, N. Y., is tho Inventor. Tunnel to Aid Irrigation. The Gunnison Irrigation tunnel Is to be begun within a month, according to report. Tho tunnel will cost $2,-0OO.CO0 $2,-0OO.CO0 and will bo in two sections, ono two miles long, through a spur In tho cliffs, and tho othor four miles long, through tho rldgo dividing tho waters of tho Gunnison from those ot tho Uncompahgro Valley.. Col. Eighty- HHH five miles of Irrigation canals will bo, HHJ fed by this tunnel. Tho section of the HVjjVJ tunnel will vary somewhat, but wlllj jHHJ average 12 by 12 foot. Tho Rcclama- HHI tlon act, which passed both house. VHJ and was signed by tho president a HH year ngo, provides for this great work. SHJ T5o tunnel will start at a point In tho HB Gunnison canyon, about twelve miles' HHJ northenst of Montrose. r itHH Wireless Telegraphy. HHJ The annual report of tho mipcrln- HH tendent of tho coast nnd geodetic sur-' HHJ voy says, among other things, Hint the. -HHJ development of wireless telegraph sys-' ' jHH terns during the )ear rendered It lm- iH portant that experiments sbou! be1 IftLI made to determine whether it was ' practicable to use the wlroleas tclo-' jH graph for tho purpose of oxcbaiiKtngl H tlmo signals In the longttudo work off tho Survey. Tho Importance of a snc-i H cessful wireless telegraph system to aj H chart mukcr organization llko tho! H Coast and Geodetic Survey can bo un- ' (lorstood when It Is remembered that' H tho method ot determining longltudo fl by lunar distances Is unsatisfactory! H from tho standpoint ot accuracy andi VH that by tho chromomctrlc method thej ll cost ot a longltudo determination ln-1 laLI creases with tho cost of travel be- il tween stations, and Its accuracy do-) il creases as tho tlmo rcqulrod to mako. JLLlll a round trip Increases. It has bcanl 'H customary In Alaska to obtain tho ro-i suits from seven round trips of a steamer for tho determination ot tho, ; d'ttunco of longltudo between Import- t ant stations. Tho errors pertaining to H tho two preceding moUiods nro clthor fg abolished or reduced to a minimum by tho telegraphic method. It moots all jH modern requirements for accuracy and , Is comparatively Inexpensive. Unfor- iJAI Innately for tho accurato and rapid lijLI construction ot charts, telegraph lines lll and cables do not penetrate every- tlH whero. I'lfl IIH Convertible Chair for the Baby. ijl Peoplo who aro blosscd with plenty :H of money can afford to buy any nam- IH ,ber ot chairs for thoir chlldron, the lH 'latter generally having their own lit ' tie rockors and hlfeh chairs, entirely t Independent of the ones used by the ,H older peoplo. This is well enough for , ifll tho family with plenty of cash and jH room to placo tho furniture, bnt for 'H tho poor nian who has little ot either High Chair, Roller and Rocker Com tH the combination which wo show nay M provide a wolcomo substitute. It has H been designed especially to answer M tho purposo of tho high chair, rockor M and wheel chair, and yet It occupies H no moro space In a room than any.one H of theso pieces of furnlturo would. ' IH Only a llttlo study will bo required to , IH mastor tho details of construction, and 11 learn how to convert this pleco of fur- fiH nlturo from n rocker to a rollor or elo- jH vato tho scat to tho position required H to enablo tho child to sit at tho ta- H bl. Tho chair Is fitted with four ' H short legs, rigidly nttached to tho jH scat, and to tho end of each leg Is jH pivoted a rocker, thoso secured to tho H front legs being considerably longer H than thusa which project toward tho " H front. When tho cbnlr is to bo used H it tho tablo tho rockers aro oxtendod, , H as shown in tho upper picture, with n H pin driven through holes whoro the J H rockors cross each other. When used H .is a rockor tho curved pieces aro low- -y 7 crcd into tho position shown lu tho , f&V second drawing, whoro tho pin n'alu Px serves to hold them rigid, To mako s , H roll chair the four wheals aro turned t IH beneath tho rockers by revolving tho f IH short arms which carry them. j H Warren W. Lepard of Otsego, Mich.. ' IH Is tho lnvontor. t H i B Iron Girders In Use Forty Years. I H Woll preserved iron glrdora and I LH beams aro exhibited by tho floor frain- . j M Ing oi a building, now being dcinol- M Ishcd, at tho cornor ot William street M anil Exchange place, Now York City. tt This building dates back of tho civil IH war. It has brick walls faced with igtl marb.o, and floors of earth filling on ,!H all iron framing. This arrangement '. and details of tho floor construction H are notable Tho beams and girders 19 show only spots of rust, tho general ! surfaces showing clthor tho original IH paint or, whero the paint has scaled jjjH oil, tno oxide scalo ot tho rolling mill JjH For Irrigating Texas Land. H & project Is on foot in Laredo, Tea-, 3 to Install an electric plant at the coil $M mines, tweuty-nvo miles above lArcdo, ifl ot Buttlclent capacity to convoy powari j'l up and down both sides ot the river,, H tu b'j used In Irrigating many tuousi H and acres of vulloy laud, i H |