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Show I RECENT INVENTIONS. Marino propeller shafts aro prevent-'d prevent-'d from corroding by covering the e-oEcd e-oEcd portions with a coaling of lead or ithfr pllablo metal. Corks nre treated with beeswax, para-Tin para-Tin or other' wax and then coated with utta pcrcha. to replnco rubber stoppers stop-pers for bottfes containing nclds or lulds which evaporate easily, tho cork 'jelng cheaper than rubber. Enyelppcs can lie easily -ejened by new devlco which Is formed of a bMo mpportlng two uprights with slots in 'ho sides to guide a knlfe-hlado driven lown by a l.nob nt tho top to sllco a hln strip from tho edge of the letter. An Improved life-saving buoy is formed of a Jacket to bo buttoned tround the wearer to support two quadrant-shaped inflated pockets extend-bit extend-bit from tho sides of the garment un-1e- tho arms, the. latter being left 'reo. Tho neck of a nonircfljiablo bottle has a projection fiom ono sldo of the op. through which the cork Is pushed o tho highest point in tho neck and lieu forced down tn tho bottle by a plti placed at the top, the neck being broken In order to ret the cork out. To Indlcato the distance traveled by railway cars a bevel-gear wheel 13 mounted on the car axle to mesh with a second wheel and drive a mechanical arrangement under the car, designed to nn In cither direction and turn a fchaft connected with a set of dlal3 ns!do the carl Pavements can bo kept clean by a new machlno which ha3 a receptacle mounted on wheels wjth a mouth extending ex-tending down level with the pavement, brushes being arranged over tho opening open-ing to revolvo and taka up the dir. as tho sweeper la pushed along by tho handle at tho rear. To facllltato tho access of air to the flames and provent the production of soot, a new acetylene burner la formed of a curved, pipe, which has openings In Its outer surface to throw tho flames ; further opart as they 'project from tho burner, the Jets thus forming rays around a scml-clrcle. Writing can bo easily taught In school by a new copy book, which has an. outer cover provided with a rqd at tho center of tho "back to hold tho leaves In place and support a movable copy slip, which slides down as a line la written to cover It and keep tho pupil pu-pil from looking at It Instead of tho copy. In order to produce a racing scene on a theater stage nn Englishman has designed an endless track, mounted nn rollera and driven In a,dlrect!on op-poMto op-poMto to the motion of tho animals. The roller splnd!s jun in oil baths fo prevent noise, and a panorama screen of scenery Is provided, while 'teats of air are blown on tho Jockeys. |